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Prof. Mario Campanelli (University of London)08/05/2023, 08:45
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Prof. Tova Holmes (CMS, University of Tennessee)08/05/2023, 09:20
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C.-P. Yuan (MSU)08/05/2023, 09:55
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Prof. Kaladi S. Babu (Oklahoma State University)08/05/2023, 11:00
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Prof. David Caratelli (UC Santa Barbara)08/05/2023, 11:35
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Prof. Ramon Winterhalder (UC Louvain, Belgium)08/05/2023, 12:10
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Joao Paulo Pinheiro (Universitat de Barcelona)08/05/2023, 14:15BSM
We present a detailed analysis of the spectral data of Borexino Phase II, with
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the aim of exploiting its full potential to constrain scenarios beyond the Standard Model. In
particular, we quantify the constraints imposed on neutrino magnetic moments, neutrino
non-standard interactions, and several simplified models with light scalar, pseudoscalar
or vector mediators. Our analysis shows... -
Benedikt Schosser (Heidelberg University)08/05/2023, 14:15
Starobinsky inflation is an attractive, fundamental model to
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explain the Planck measurements, and its higher-order extension may
allow us to probe quantum gravity effects. We show that future CMB
data combined with the 21cm intensity map from SKA will meaningfully
probe such an extended Starobinsky model. A combined analysis will
provide a precise measurement and intriguing... -
London Cooper-Troendle08/05/2023, 14:15Neutrinos
The MicroBooNE detector is a Liquid Argon Time Projection Chamber (LArTPC) located along the Booster Neutrino Beam at Fermilab. One of MicroBooNE’s key physics goals is the measurement of neutrino-argon cross sections. The MicroBooNE detector’s fully active volume and precision reconstruction and calorimetry allow for accurate measurements of lepton kinematics as well as visible hadronic...
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Mohamed Fawzi (SUNY Buffalo)08/05/2023, 14:15
We investigate the Teukolsky equations in horizon-penetrating coordinates to study the behavior of perturbation waves crossing the outer horizon. For this purpose, we use the null ingoing/outgoing Eddington-Finkelstein coordinates. We find that the radial equation is a confluent form of Heun’s differential equation in both ingoing/outgoing coordinates, with three singularities. The radial...
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Leon Manuel Garcia de la Vega08/05/2023, 14:15
In this talk we will discuss the possibility that a gauged U(1)' symmetry mediates dark matter self interactions. The breaking of this symmetry induces a Z-Z' mass mixing term, connecting the dark and visible sectors. After symmetry breaking of the U(1)', the fermion content of the dark sector is divided into right handed neutrinos and a stable dark matter candidate. We discuss the neutrino...
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Si Wang08/05/2023, 14:15BSM
With simplest extension of SM symmetry by adding one extra U(1) symmetry, we introduce a new particle Z'. From the collider kinematic variable distribution, we can measure the deviation of the new model from background, with the sensitivity equation, we plot the constraints. Compare to current weak experimental constraints, we have better constraints in our lepton collider processes.
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Paul Thompson (University of Birmingham (GB))08/05/2023, 14:15BSM
The discovery of the Higgs boson with the mass of 125 GeV confirmed the mass generation mechanism via spontaneous electroweak symmetry breaking and completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many experimental measurements, it is not capable of solely explaining some observations. Many extensions of the Standard...
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Alessandro Vicini (Università degli Studi e INFN Milano (IT))08/05/2023, 14:15
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Pouya Asadi (University of Oregon)08/05/2023, 14:30
I put forward a novel variation method for calculating the mass and PDF of hadrons in 1+1D models. The template functions in our method minimize a Free Energy functional composed of free partons kinetic energy and Renyi entropy of all pairs of partons. Our results suggest hadrons in these models minimize this Free Energy functional. I will comment on extending our calculation to confining...
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Rachel Nguyen (University of Illinois at Urbana-Champaign)08/05/2023, 14:30BSM
Secondary charged particles in proton beam dump experiments offer a new production mechanism for new particles like dark photons. Proton beam dump experiments produce a multitude of secondary charged pions. As the charged pions travel down the beam path, they scatter off of the target’s nuclei and can radiate a dark photon. We use chiral perturbation theory to calculate the production of dark...
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zach bogorad08/05/2023, 14:30BSM
Significant effort has been devoted to searching for new fundamental forces of nature. At short length scales (below approximately 10 nm), the strongest experimental constraints come from neutron scattering from individual nuclei in gases. The leading experiments at longer length scales instead measure forces between macroscopic test masses. We propose a hybrid of these two approaches:...
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Douglas Tuckler08/05/2023, 14:30BSM
In $U(1)_R$ extensions of supersymmetric models, the bino and its Dirac partner, the singlino, can play the role of right-handed neutrinos. The bino and the singlino form a pseudo-dirac pair, dubbed the `bi$\nu$o', which can generate Standard Model neutrino masses via the inverse seesaw mechanism. We investigate the prospects for detecting long-lived bi$\nu$os at SHiP, where GeV scale...
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Jiheon Lee (KAIST)08/05/2023, 14:30
We introduce the gauged quintessence model, in which the dark energy field (quintessence) has a U(1) gauge symmetry. This is the first quintessence model under a gauge symmetry. We identify the real part of the complex scalar as the dark energy field (quintessence), while the imaginary part is the longitudinal component of a new gauge boson. It brings interesting characters to dark energy...
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Sri Aditya Gadam08/05/2023, 14:30BSM
We show that bottom-strange production at a high energy muon collider, $\mu^+ \mu^- \to b s$, is a sensitive probe of new physics. We consider the full set of four fermion contact interactions that contribute to this process at dimension 6, and discuss the complementarity of a muon collider and rare $B$ meson decays that probe the new physics.
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If a signal were to be found at a muon collider,... -
Wanwei Wu (Fermi National Accelerator Lab. (US))08/05/2023, 14:30Neutrinos
MicroBooNE is a neutrino experiment that utilizes a single-phase liquid argon time projection chamber (LArTPC) located on-axis in the Booster Neutrino Beam at Fermilab. One of its primary goals is to investigate the nature of the excess of low-energy electromagnetic-like events observed by the MiniBooNE collaboration. In this talk, I will present the recent results from MicroBooNE’s low energy...
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Dr Eduardo Peinado Rodriguez (Instituto de Fisica UNAM, Mexico)08/05/2023, 14:45BSM
In this talk, we will present a study on the effects of the dark Z model in current and future low-energy parity-violating experiments. In particular, we will give the constraints from electroweak pole observables, CEvNS, BaBar, and the future sensitivity for SoLID. We will also present a re-analysis of other existing or upcoming low-energy experiments, such as E158, Qweak, P2, MOLLER, and...
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Makana Silva (The Ohio State University)08/05/2023, 14:45
Primordial black holes (PBHs) within the mass range $10^{17} - 10^{22}$ g are a favorable candidate for describing all of the dark matter content. Towards the lower end of this mass range, the Hawking temperature, $T_H$, of these PBHs is $T_H > 100$ keV, allowing for the creation of electron-positron pairs, thus making their Hawking radiation a useful constraint for most current and future...
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Gustavo Figueiredo Severiano Alves (University Of Sao Paulo)08/05/2023, 14:45BSM
We explore the neutrino sector of the minimal left-right symmetric model, with the additional charge conjugation discrete symmetry, in the novel regime where type-I and type-II seesaw mechanisms are equally responsible for the light neutrino masses, which can result in large active-sterile mixing. We show that unless the charged lepton mixing matrix is the identity and the right handed...
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Prudhvi Bhattiprolu (University of Michigan)08/05/2023, 14:45BSM
Vectorlike leptons are an intriguing possibility for physics beyond the Standard Model. This talk is concerned with the example of weak isosinglet vectorlike leptons that decay through a small mixing with the tau lepton, for which the discovery and exclusion reach of the Large Hadron Collider and future proposed hadron colliders is limited. For this minimal model, I will argue that an $e^+...
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Mitrajyoti Ghosh (Cornell University)08/05/2023, 14:45
In the non-relativistic limit, scattering of two particles by boson exchange can be described using a static potential, i.e, that of a force between them. The exchange of two fermions can also lead to a force, as if the two fermions behave like an effective boson. These forces are called "quantum forces", and the range of these forces is inversely proportional to the mass of the fermions being...
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Lorenzo Bellagamba (ATLAS)08/05/2023, 14:45
The remarkably large dataset collected with the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to test theoretical predictions with unprecedented precision. Recent measurements of total and differential top-quark cross sections as well properties of top-quark production are presented, including new measurements of...
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Jia Jian Teoh (ATLAS), Jia Jian Teoh (University of Toronto (CA))08/05/2023, 14:45BSM
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS Collaboration has developed a broad search program for DM candidates in final states with large missing transverse momentum produced in association...
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Arushi Bodas08/05/2023, 14:45
Anisotropies of gravitational wave background (GWB) from a first-order phase transition could provide a new map of primordial inhomogeneities, analogous to the CMB. In multi-field inflation, this map could differ significantly from CMB if its inhomogeneities are sourced by a quantum field different from the one sourcing CMB (adiabatic) inhomogeneities. While a highly anisotropic GWB could...
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Daven Wei Ren Ho08/05/2023, 15:00
The acoustic peaks in the CMB power spectrum contain valuable information for studying particle physics. A shift in the position of these peaks corresponds to a phase shift in the acoustic oscillations of the photon-baryon fluid before recombination, which only corresponds to specific types of dark sector physics. As such, it provides a clean cosmological signature for identifying new physics...
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Mrunal Korwar08/05/2023, 15:00BSM
For a class of macroscopic dark matter models, inelastic scattering of dark matter off a nucleus can generate electromagnetic signatures with GeV-scale energy. The IceCube detector, with its kilometer-scale size, is ideal for directly detecting such inelastic scattering. Based on the slow particle trigger for the DeepCore detector, we perform a detailed signal and background simulation to...
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Xuheng Luo08/05/2023, 15:00BSM
In the late universe, the massive cosmic neutrino background alters the growth of structure, providing a unique opportunity to study physics beyond the standard model. In this talk, I will show that neutrinos with long-range self-interaction can significantly affect late-time cosmological observables, with coupling strengths a few orders of magnitude stronger than gravity.
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Nabin Bhatta (Virginia Tech)08/05/2023, 15:00
In canonical quantum mechanics (QM), energy eigenstates can be thought of as evolving in the phase space of a classical harmonic oscillator. Nambu quantum mechanics is a particular generalization of canonical QM whereby this phase space is extended to that of an asymmetric top, introducing two “deformation parameters”. Canonical QM can then be interpreted as the limiting case where both of...
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Pierre-Hugues Beauchemin (ATLAS)08/05/2023, 15:00
Precision measurements of the production cross-sections of W/Z boson at LHC provide important tests of perturbative QCD, information about the parton distribution functions for quarks within the proton and fundamental parameters of the Standard Model. Extremely precise double-differential measurement of Z transverse momentum and rapidity at centre-of-mass energy of 8 TeV will be presented....
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Roy Brener (Weizmann Institute of Science (IL))08/05/2023, 15:00BSM
Many theories beyond the Standard Model (SM) predict that New Physics (NP) will manifest by decaying into final states involving leptons. Leptoquarks are predicted by different NP theories to describe similarities between the lepton and quark sectors of the SM. Other NP theories relating to quantum gravity predict periodic signatures in dilepton final states, where tightly-spaced resonance...
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Xuhui JIANG08/05/2023, 15:00BSM
As one of the hypothetical principles in the Standard Model (SM), lepton flavor universality (LFU) should be tested with a precision as high as possible such that the physics violating this principle can be fully examined. The run of $Z$ factory at a future $e^+e^-$ collider such as CEPC or FCC-$ee$ provides a great opportunity to perform this task because of the large statistics and high...
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Prof. Guey-Lin Lin (National Yang Ming Chiao Tung University)08/05/2023, 15:00
We present a method to verify Mikheyev-Smirnov-Wolfenstein effect during the propagation of SN neutrinos from the SN core to the Earth. The non-MSW scenarios to be distinguished from the MSW one are the incoherent flavor transition probability for neutrino propagation in the vacuum and the flavor equalization induced by fast flavor conversions. Our approach involves studying time evolution of...
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Dr Moinul Rahat (University of Southampton)08/05/2023, 15:15BSM
The origin of Majorana neutrino masses in a Majoron model provide a well-motivated scenario for the generation of identifiable primordial stochastic background of gravitational waves. In this talk I will discuss how a spectrum with a joint contribution both from a strong first order phase transition and from global cosmic strings can emerge naturally in these models. Moreover, the interplay...
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Matthew Jones (Purdue University (US))08/05/2023, 15:15
Measurements of heavy quark hadronization fractions, or the probabilities $f_q$ that a bottom quark forms one of the weakly decaying B hadrons, are essential for precision measurements of B branching fractions made at hadron colliders and potentially limit searches for new physics in $B_s$ decays. Although once thought to be universal, recent measurements have suggested an environmental and...
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Pankaj Munbodh (University of California Santa Cruz)08/05/2023, 15:15BSM
Lepton Flavor Violation (LFV) is one of the cleanest probes of Beyond the Standard Model (BSM) Physics. In this work, we explore the sensitivity of the channel $e^+ e^- \to \tau \mu$ to BSM physics above the $\sim$ TeV scale at the proposed circular electron-positron collider FCC-ee. We compute the expected cross-section $\sigma(e^+ e^- \to \tau \mu)$ in the Standard Model Effective Field...
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Mr Robert Clemenson (University of Sussex)08/05/2023, 15:15
The Randall-Sundrum model has been a great source of interest to theorists
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and phenomenologists for over two decades, both for its novel solution to the hierarchy problem, and its phenomenological consequences. The modulus field associated with the warped extra dimension of this model requires stabilization. In this talk I will present ongoing work to investigate the feasibility of... -
Flera Rizatdinova (ATLAS)08/05/2023, 15:15BSM
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. This talk will present the latest results from SUSY searches conducted by the ATLAS experiment. The searches target multiple final states and different assumptions about the decay mode of the produced SUSY particles,...
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Stephan Meighen-Berger08/05/2023, 15:15BSM
We present a new search for weakly interacting massive particles utilizing neutrino telescopes. We consider galactic and extra-galactic dark matter and analyze ten years of public IceCube data, setting stringent bounds on massive dark matter annihilation. In addition, we make predictions for P-ONE, a new neutrino telescope in the Pacific Ocean, showing that its sensitivity may even exceed...
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Nick Ekanger (Virginia Tech)08/05/2023, 15:15Neutrinos
The isotropic signal of neutrinos from all past core-collapse supernovae, known as the diffuse supernova neutrino background (DSNB), is close to being detected in Super-Kamiokande. The most optimistic models are already disfavored with current upper limits so improving our theoretical understanding of the DSNB is crucial in the next few years, especially with upcoming detectors. We discuss the...
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Runqing Wang08/05/2023, 15:30
We will talk about a Hilbert series approach to build the operator basis for a N = 1 supersymmetry theory with chiral superfields. We give explicitly the form of the corrections that remove redundancies due to the equations of motion and integration by parts. In addition, we derive the maps between the correction spaces. This technique allows us to calculate the number of independent operators...
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Brooks Thomas08/05/2023, 15:30
Cosmic stasis is a phenomenon in which the abundances of multiple cosmological energy components — components such as matter, radiation, or vacuum energy — remain effectively constant despite the expansion of the universe. One mechanism which can give rise to an extended period of cosmic stasis is the evaporation of a population of primordial black holes (PBHs). In this talk, I review how...
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Morgan Cassidy08/05/2023, 15:30BSM
We study a CP violating top-Higgs coupling at the future muon collider. We consider the processes $tth$, $tth\nu\nu$, and $tbh\mu\nu$. Using energies of 1, 3, 10, and 30 TeV, we discuss cross section dependence on the CP phase and show how different processes dominate at different benchmark energies. We give projected bounds on the CP phase at 95% CL and discuss the required luminosity for...
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Clayton Ristow (University of Maryland)08/05/2023, 15:30BSM
Black hole superradiance is a phenomenon in which, purely through gravitational interactions, light bosons are spontaneously produced outside spinning black holes. Through this effect, an exponentially growing Bose-Einstien condensate cloud forms around the black hole. In the case of dark photon superradiance, the cloud can form into strings of magnetic flux analogous to Abrikosov vortices in...
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Graham Kribs08/05/2023, 15:30BSM
Inelastic dark matter with moderate splittings, $\mathcal{O}({\rm few} \; {\rm to} \; 150)$ keV, can upscatter to an excited state in the Earth, with the excited state subsequently decaying, leaving a distinctive monoenergetic photon signal in large underground detectors. I'll show that proposed large volume gaseous detectors (CYGNUS) will have excellent sensitivity to this signal. I'll...
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Dr Peter Denton (Brookhaven National Laboratory)08/05/2023, 15:30Neutrinos
Long-baseline (LBL) accelerator neutrino oscillation experiments, such as NOvA and T2K in the current generation, and DUNE-LBL and HK-LBL in the coming years, will measure the remaining unknown oscillation parameters with excellent precision. These analyses assume external input on the solar parameters, $\theta_{12}$ and $\Delta m^2_{21}$, from solar experiments such as SNO, SK, and Borexino,...
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Brendon Bullard (ATLAS)08/05/2023, 15:30Flavor
The high center-of-mass energy of proton-proton collisions and the large available datasets at the CERN Large Hadron Collider allow to study rare processes of the Standard Model (SM) with unprecedented precision and search for new physics that might enhance extremely rare processes in the SM. Measurements of rare SM processes provide new tests of the SM predictions with the potential to unveil...
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Blaz Leban (ATLAS)08/05/2023, 15:30BSM
Many new physics models predict the existence of additional particles. This talk summarizes recent ATLAS searches for Beyond-the-Standard-Model heavy resonances which decay to pairs of bosons, heavy quarks, or leptons, using Run 2 data collected at the LHC. The experimental methods are explained, including the jet substructure techniques used in some searches to disentangle the hadronic decay...
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Tina Kahniashvili08/05/2023, 15:45
In my talk I will address possible parity symmetry violation as manifested through prefered chirality in the early universe and its imprints on cosmological observables. I will discuss the chiral plasma instability (CPI) induced in primordial plasma and driven by chiral magnetic effect. My particular interest will be to estimate the gravitational wave signal sourced by CPI and to determine its...
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Steven Emilio Ferrante (Rutgers State Univ. of New Jersey (US))08/05/2023, 15:45
I will describe the collider phenomenology of near-continuum dark matter, a model that gives rise to a gapped tower of Kaluza-Klein (KK) states. The model is coupled to the Standard Model via a Z-portal coupling, and the unique experimental signatures of this model include a cascade decay with large displaced vertices, a characteristic fermion energy spectrum, and more, all of which will be...
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Keping Xie (University of Pittsburgh)08/05/2023, 15:45Neutrinos
We present predictions of the cross section of ultrahigh-energy neutrino-nucleon scattering. The calculations are based on CT18NNLO parton distribution functions and their uncertainties. For the highest energies, we extrapolate the PDFs to small x according to several assumptions, which affect the uncertainties at such high energies. The results can be applied to astrophysical neutrino...
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Maximilian Ruhdorfer (Cornell)08/05/2023, 15:45BSM
In this talk I will propose to probe the Higgs boson decay to invisible particles at a muon collider by observing the forward muons that are produced in association with the Higgs in the Z-boson fusion channel. I will argue that an excellent sensitivity is possible provided a forward muon detector is installed. We find that the resolution on the measurement of the muon energy and angle will be...
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Prof. Joel Walker (Sam Houston State University)08/05/2023, 15:45
We describe a new jet clustering algorithm named SIFT (Scale-Invariant Filtered Tree) that maintains the resolution of substructure for collimated decay products at large boosts. The scale-invariant measure combines properties of kT and anti-kT by preferring early association of soft radiation with a resilient hard axis, while avoiding the specification of a fixed cone size. Integrated...
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Sagar Airen08/05/2023, 15:45BSM
We show how precision SM measurements can be repurposed to constraint certain types of new physics (NP) without invoking SMEFT. Motivated by highly precise measurement of W mass by the CDF collaboration, we demonstrate our proposal for the specific case of W mass data. W boson gives lepton + MET final state, which makes it special because it cannot be reconstructed completely. Any NP, which...
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Ms ROJALIN PADHAN (Institute of Physics, Bhubaneswar)08/05/2023, 15:45Dark Matter
We consider the gauged $B-L$ model which is extended with a secluded dark sector, comprising of two dark sector particles. In this framework the lightest $Z_2$-odd particle is the dark matter candidate, having a feeble interaction with all other SM and BSM states. The next-to-lightest $Z_2$-odd particle in the dark sector is a super-wimp, with large interaction strength with the SM and BSM...
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Aidan Reilly (Stanford University)08/05/2023, 15:45
We analyze the UV breakdown of sub-GeV Dark Matter Models that live in a new, dark U(1) sector. Many of these models include a scalar field, which is either the Dark Matter itself or a dark Higgs field that generates mass terms for the Dark Matter particle via Spontaneous Symmetry Breaking. A quartic self coupling of this scalar field is generically allowed, and we show that its running is...
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Claudio Andrea Manzari (UC Berkeley & LBNL)08/05/2023, 16:30BSM
I will discuss theories of a complete mirror world with parity (P) solving the strong CP problem. P exchanges the entire Standard Model with its mirror copy and two new mass scales arise: v' where parity and mirror electroweak symmetry are spontaneously broken, and v3 where the color groups break to the diagonal strong interactions. The strong CP problem is solved even if v3 << v' and the...
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Jay Desai (Stony Brook University)08/05/2023, 16:30
A muon collider provides an interesting opportunity to test various aspects of Higgs physics and potential BSM models. For a muon collider, Vector-boson fusion provides the dominant channel for the production of Higgs bosons. We calculate the lowest and higher order Higgs jet distribution as a function of jet invariant mass for the super-renormalizable splitting $h\rightarrow hh$ and compare...
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Aman Singal (Stony Brook University)08/05/2023, 16:30Dark Matter
We present a new calculation of dark matter-electron scattering rates in semiconductors using atomic centered gaussian basis sets within the framework of density functional theory. We treat both core and valence orbitals similarly and compare with prior results, emphasizing the importance of all-electron effects, which enhance dark-matter electron scattering rates at high recoil energies. We...
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ajay Kaladharan08/05/2023, 16:30BSM
Electroweak baryogenesis is a popular mechanism to generate baryon asymmetry at the electroweak scale. The key ingredient in the estimation of baryon asymmetry during electroweak baryogenesis is the bubble profile. In EWBG studies, it is a routine practice to parametrize the bubble profile by the kink profile using the $\tanh$ function. A more refined estimation of the bubble profile can be...
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Mudit Rai08/05/2023, 16:30
A light singlet scalar field feebly coupled through the super-renormalizable Higgs portal provides a minimal and well-motivated realization of ultra-light bosonic dark matter. We study the cosmological production of dark matter in this model by elucidating the dynamics of two sources of scalar field misalignment generated during the radiation era. We compare our relic abundance predictions...
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Ben Lillard (University of Oregon)08/05/2023, 16:30
I introduce a new method for calculating the dark matter (DM) scattering rate in a directionally sensitive detector, which for the most complicated analyses can be multiple orders of magnitude faster than previous approaches. The new method projects each ingredient of the rate calculation, such as the DM velocity distribution, onto a basis of orthogonal functions. This reduces the rate...
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Felix Yu (Johannes Gutenberg University Mainz)08/05/2023, 16:30
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Tom Steudtner08/05/2023, 16:30BSM
This talk addresses the notorious metastability of the Standard Model and promotes it to a model building task. We explore the ingredients required to stabilize the SM up to the Planck scale without encountering sub-Planckian Landau poles. Using the SM extended by vectorlike fermions, we chart out the corresponding landscape of Higgs stability. We find that the "gauge portal mechanism",...
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Logan Page (Brigham Young University)08/05/2023, 16:45BSM
Twin Higgs models address the hierarchy problem and can provide interesting dark matter possibilities. However, the cosmology of these models can be problematic.
I present a new twin Higgs model in which the usual color group originates from the spontaneous breaking of a gauged SU(4) symmetry in the visible sector. In the hidden sector the SU(4) is not broken leading to new dark matter...
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Suruj Jyoti Das (Indian Institute of Technology Guwahati)08/05/2023, 16:45BSM
We propose a scenario where dark matter (DM) with a wide mass range from a few keV to PeV can be produced solely from evaporating primordial black holes (PBH), while being consistent with the required free streaming length for structure formation. If DM does not have any other interactions apart from gravity and the universe has a PBH dominated phase at early epoch, then PBH evaporation...
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Sarunas Verner (University of Florida)08/05/2023, 16:45
In this talk, I discuss the production of a spectator scalar dark matter field that directly couples to the inflaton. Two specific inflationary potentials, the Starobinsky and T-model of inflation, are considered, which satisfy the constraints on the scalar tilt (n_s) and tensor-to-scalar ratio (r) as measured by the Planck satellite. Excitation of the light scalar dark matter during inflation...
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Siyang Ling08/05/2023, 16:45BSM
The phenomenon of cosmological gravitational particle production (CGPP) is expected to occur during the period of inflation and the transition into a hot big bang cosmology. Particles may be produced even if they only couple directly to gravity, and so CGPP provides a natural explanation for the origin of dark matter. In this work we study the gravitational production of massive spin-2...
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Benjamin Lehmann (Massachusetts Institute of Technology)08/05/2023, 16:45Dark Matter
Direct detection for sub-GeV dark matter is developing rapidly, with many novel experimental ideas and theoretical methods emerging. In this work, we extend the dielectric formalism for dark matter scattering to incorporate anisotropic material responses, enabling directionally-sensitive experiments with a broad class of target materials. Using a simple model of an anisotropic electron gas, we...
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Ahmed Youssef (University of Cincinnati)08/05/2023, 16:45
The hadronization process plays a crucial role in Monte Carlo event generators, where quarks and gluons are combined into observable hadrons. However, while current phenomenological models have been quite successful overall in simulating this process, there remain phenomenological areas where they still lack accuracy in describing the underlying physics. Recent research has taken a new...
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Dr Phuoc Ha (Towson University)08/05/2023, 16:45
Using a simple eikonal approach to the treatment of Coulomb-nuclear interference and form-factors effects and taking into account the curvature effects in high-energy $pp$ and $\bar{p}p$ scattering, we determine the basic parameters $B$, $\rho$, and $\sigma_{\rm tot}$ from fits to experiment at $W=\sqrt s=$ 53 GeV, 62.3 GeV, 8 TeV, and 13 TeV. We then investigate the differential cross...
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Bethany Suter (UC Berkeley)08/05/2023, 17:00BSM
Anomaly Mediated Supersymmetry Breaking or AMSB is a promising new technique that allows one to use the solvability of SUSY chiral theories and translate that in a standard way into non-SUSY theories. I will discuss how this new method works and apply it to a certain set of chiral gauge theories with fields in the fundamental, antifundamental and antisymmetric representations. I find that this...
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Sunhaeng Hur (Virginia Tech)08/05/2023, 17:00
We consider the possibility of constraining the dark matter distribution in the Shapley Supercluster from the velocity distribution of galaxy clusters and galaxies with in it.
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Walter Tangarife (Loyola University Chicago)08/05/2023, 17:00BSM
We present a gauged baryon number model as an example of models where all new fermions required to cancel out the anomalies help to solve phenomenological problems of the standard model (SM). Dark fermion doublets, along with the isosinglet charged fermions, in conjunction with a set of SM-singlet fermions, participate in the generation of small neutrino masses through the Dirac-dark Zee...
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Peter Reimitz08/05/2023, 17:00
We perform a complete study of the electroweak precision observables and electroweak gauge boson pair production in terms of the SMEFT up to
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$\mathcal{O}(1/\Lambda^4)$ under the assumption of universal, C and P conserving new physics. We show that the analysis of data from those two sectors allows us to obtain closed constraints in the relevant parameter space in this scenario. In particular... -
Jared Barron08/05/2023, 17:00BSM
Atomic dark matter (aDM) is a simple but highly theoretically motivated possibility for an interacting dark sector that could constitute some or all of dark matter. We perform a comprehensive study of precision cosmological observables on minimal atomic dark matter, exploring for the first time the full parameter space of dark QED coupling and dark electron and proton masses...
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Hongkai Liu (Technion)08/05/2023, 17:00Axion and ALP
The electron-ion collider (EIC), a new powerful high-luminosity
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facility, will be able to open up new windows of opportunities to explore new physics. In this
paper, we study the potential of the EIC to probe the coupling between axion-like particles
(ALPs) and photons in coherent scattering, where the ion stays intact, resulting in a cross section
enhancement proportional to the square of... -
Duncan Adams (C.N. Yang Institute of Theoretical Physics)08/05/2023, 17:00Dark Matter
The Migdal effect, ionization induced by a nuclear recoil, is an important atomic process for pushing conventional dark matter searches into the MeV mass range. The Migdal effect has of yet not been definitively observed using standard model probes. We have studied the viability of measuring the neutron induced Migdal effect in liquid xenon, silicon, and liquid argon. We present the results of...
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Zhongtian Dong (University of Kansas)08/05/2023, 17:00
We revisit the combinatorial problem at the LHC, taking $t\bar{t}$ production as an example. The combinatorial ambiguity in this case can be reformulated in terms of a quadratic unconstrained binary optimization problem. Finding the solution to the combinatorial problem becomes equivalent to finding the ground state of the Ising Hamiltonian. We explore several variational quantum algorithms to...
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Motoo Suzuki08/05/2023, 17:15BSM
We examine the possibility of building a natural non-supersymmetric model of spontaneous CP violation equipped with the Nelson-Barr (NB) mechanism to address the strong CP problem. Our approach is to utilize a doubly composite dynamics where the first confinement of the CFT occurs at the scale of spontaneous CP violation (SCPV) and the second confinement at the TeV scale. A holographic dual...
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Shreyashi Chakdar08/05/2023, 17:15BSM
We investigate the phenomenology of a non-thermal dark matter (DM) in the context of flavor models that explain the hierarchy in the masses and mixings of quarks and leptons via the Froggatt-Nielsen (FN) mechanism. A flavor-dependent $U(1)_{FN}$ symmetry explains the fermion mass and mixing hierarchy, and also provides a mechanism for suppressed interactions of the DM, assumed to be a Majorana...
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Zhen Liu08/05/2023, 17:15Axion and ALP
Heavy QCD axions are well-motivated extensions of the QCD axion that address the quality problem while still solving the strong CP problem. Owing to the gluon coupling, critical for solving the strong CP problem, these axions can be produced in significant numbers in beam dump and collider environments for axion decay constants as large as PeV, relevant for addressing the axion quality...
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Hong-Yi Zhang08/05/2023, 17:15
Vector dark matter (VDM) is a good candidate of dark matter with rich phenomenology. In this work, we study nonminimal couplings to gravity for VDM in the wave regime, where the particle mass is below $30\rm{eV}$. In the nonrelativistic limit, the nonminimal coupling with the lowest mass dimension leads to effective self-interactions that affect the mass-radius relation of vector solitons,...
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jacob scott08/05/2023, 17:15
In HEP, we preform multidimensional integrals to compute observables to compare with experimental data. To do so, we use Monte Carlo integration -- it scales well with dimensionality but it suffers from a slow convergence rate. As such, it is important to reduce the variance of the result as much as possible and so many techniques have been created for this task. In this talk I will introduce...
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Sandip Roy08/05/2023, 17:15BSM
Dark sector theories naturally lead to multi-component scenarios for dark matter where a sub-component can dissipate energy through self-interactions, allowing it to efficiently cool inside galaxies. We present the first cosmological hydrodynamical simulations of Milky Way analogues where the majority of dark matter is collisionless Cold Dark Matter (CDM), but a sub-component (6%) is strongly...
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Ian Harris08/05/2023, 17:15Dark Matter
Nuclear scattering events with large momentum transfer in atomic, molecular, or solid-state systems may result in electronic excitations. In the context of atomic scattering by dark matter (DM), this is known as the Migdal effect, but the same effect has also been studied in molecules in the chemistry and neutron scattering literature. Here we present two distinct Migdal-like effects from DM...
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Jinchen He (University of Maryland, College Park)08/05/2023, 17:15
We present a first calculation of the unpolarized proton's isovector transverse-momentum-dependent parton distribution functions (TMDPDFs) from lattice QCD, which are essential to predict observables of multi-scale, semi-inclusive processes in the standard model. We use a $N_f=2+1+1$ MILC ensemble with valence clover fermions on a highly improved staggered quark sea (HISQ) to compute the quark...
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Stephen Roche (Saint Louis University)08/05/2023, 17:30
We present a decision tree-based implementation of autoencoder anomaly detection. A novel algorithm is presented in which a forest of decision trees is trained only on background and used as an anomaly detector. The fwX platform is used to deploy the trained autoencoder on FPGAs within the latency and resource constraints demanded by level 1 trigger systems. Results are presented with two...
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Xuce Niu08/05/2023, 17:30
- Introduce a Chern-Simons term that inflaton is coupled with a gauge boson and show that the gauge boson can be sufficiently produced during inflation.
- Constrain the mass and chemical potential of the gauge boson and the most stringent constraint is the non-Guassianity of the equilateral bispectrum.
- Show three signals of the gauge boson: oscillation with respect to the mass in the...
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Gabriele Fiore (SUNY at Buffalo)08/05/2023, 17:30
We present a calculation of the master integrals (MI's) required for the calculation of the Electroweak corrections to $gg\rightarrow \gamma\gamma$ production in which the process contains a light quark loop.
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The integrals can be broken down into four categories based on the flow of the heavy vector bosons throughout the loop. Two of the families are planar, and two are non-planar. We... -
Bharath Sambasivam08/05/2023, 17:30BSM
We consider dynamical fully 5-Dimensional cosmological solutions of the holographic dilaton to study an out-of-equilibrium alternative to the thermal Randall-Sundrum conformal phase transition. It is well known that this transition is typically strongly first order, with the requirement of a perturbative 5D gravity theory obstructing completion of the transition. We comment on a class of...
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Caleb Gemmell (University of Toronto)08/05/2023, 17:30BSM
Atomic dark matter (ADM) is a simple extension to the Standard Model that is motivated by considerations in both particle and astrophysics. ADM can alter structure formation on subgalactic scales due to its ability to dissipate energy through cooling mechanisms, but is also one realisation of a possible complex dark sector. These dark sectors have been previously studied as a solution to the...
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Kelly Stifter (Fermilab)08/05/2023, 17:30Dark Matter
SENSEI (Sub-Electron Noise Skipper Experimental Instrument) is a direct detection dark matter experiment with detectors operating at Fermilab and at the SNOLAB underground facility. The experiment consists of silicon Skipper-CCD sensors that make multiple non-destructive measurements of the charge contained in each of millions of pixels, reducing the readout noise to a level that allows for...
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Gabriel Hoshino (University of Chicago)08/05/2023, 17:30Axion and ALP
Although a direct search for the QCD axion at colliders may not be viable due to the feebleness of the axion couplings to the standard model, collider experiments may be sensitive to signatures of the axino, the supersymmetric partner of the axion. The couplings of the axion and axino are related to the axion decay constant $f_{a}$, and so collider searches for the axino may be a way to set...
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Tony Menzo08/05/2023, 17:30BSM
We introduce a new unbinned two sample test statistic sensitive to CP violation utilizing the optimal transport plan associated with the Wasserstein (earth mover's) distance. The efficacy of the test statistic is shown via two examples of CP asymmetric distributions with varying sample sizes: the Dalitz distributions of $B^0 \rightarrow K^+\pi^-\pi^0$ and of $D^0 \rightarrow \pi^+\pi^-\pi^0$...
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Isaac Wang08/05/2023, 17:45
Space-time parity can solve the strong CP problem and introduces a spontaneously broken $SU(2)_R$ gauge symmetry. We investigate the possibility of baryogenesis from a first-order $SU(2)_R$ phase transition similar to electroweak baryogenesis. We consider a model with the minimal Higgs content, for which the strong CP problem is indeed solved without introducing extra symmetry beyond parity....
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Neil Christensen (Illinois State University)08/05/2023, 17:45
We find the correct spinor amplitude for a simple photon-mediated process and show that, in contrast, the result for the same process using the standard constructive techniques do not agree with Feynman diagrams when the fermions are massive.
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Theo Heimel (Heidelberg University)08/05/2023, 17:45
Theory predictions for the LHC require precise numerical phase-space integration and generation of unweighted events. We combine machine-learned multi-channel weights with a normalizing flow for importance sampling, to improve classical methods for numerical integration. We develop an efficient bi-directional setup based on an invertible network, combining online and buffered training for...
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Mr Chester Mantel (University of Oregon)08/05/2023, 17:45BSM
Dark matter could be dark baryons made from underlying vector-like quarks which interact with the standard model as an electroweak multiplet. If the lightest dark baryon is electrically neutral with vanishing hypercharge, the leading interaction with the SM is anticipated to be through its magnetic dipole (for fermionic dark baryons). Using the non-relativistic quark model, which becomes exact...
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Jaeok Yi08/05/2023, 17:45
We study the dark gauge boson in the gauged quintessence model. The gauged quintessence is the dark energy field under a gauge symmetry, and therefore its mass varies as the quintessence scalar value changes. The change of the dark gauge boson mass brings interesting consequences. The evolution of the universe is sensitively affected by the mass-varying dark gauge boson. We study various...
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Vincent Lee (Caltech)08/05/2023, 17:45Axion and ALP
Pulsar timing arrays (PTAs) are a powerful tool to study dark matter (DM) substructure. Transiting lumps of DM can induce shift in pulsar timings due to Doppler and Shapiro effects. In this talk we first briefly review the principle of DM detection with PTAs. We then show the projected reach using the projected subhalo mass function and density profile of DM substructure from various models....
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Benoit Assi08/05/2023, 17:45BSM
Within a chiral SU(15) gauge theory in which the Standard Model fermions are bound states of massless preons, we show that proton-decay operators are likely induced at the compositeness scale, $\Lambda_{\rm{pre}}$. Our estimate of the limit imposed by searches for proton decays is $\Lambda_{\rm{pre}}>10^4$ TeV, dependent on an 8-prebaryon operator induced by SU(15) dynamics and the mass of a...
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Joshua Berger (Colorado State University)08/05/2023, 18:00BSM
I introduce and study the first class of signals that can probe the dark matter in Mesogenesis which will be observable at current and upcoming large volume neutrino experiments. The well-motivated Mesogenesis scenario for generating the observed matter-anti-matter asymmetry necessarily has dark matter charged under baryon number. Interactions of these particles with nuclei can induce nucleon...
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Varun Mathur08/05/2023, 18:00BSM
While most of dark matter needs to be cold and nonrelativistic, as we look at dark sectors, a subcomponent could be boosted. We have looked for indirect detection of boosted dark matter at intensity frontier experiments like Super-K, Hyper-K. We propose a simple scenario of looking for dark photons as the boosted subcomponent of dark matter. This can be used to place competitive constraints on...
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Ranit Das (Rutgers University)08/05/2023, 18:00
Choosing which properties of the data to use as input to multivariate decision algorithms -- a.k.a. feature selection -- is an important step in solving any problem with machine learning. While there is a clear trend towards training sophisticated deep networks on large numbers of relatively unprocessed inputs (so-called automated feature engineering), for many tasks in physics, sets of...
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Wolfgang Heinz Kilian (University of Siegen (DE)), Wolfgang Kilian (University of Siegen)08/05/2023, 18:00
Whizard is a universal program for computing observables and simulated event samples in multi-parton high-energy collider processes. While it has been developed as a tool for e+e- physics studies, it also covers LHC physics and new collider concepts such as a muon collider. Physics models are supported intrinsically and via the UFO format. Whizard version 3 accounts for the full Standard...
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Yunjia Bao (University of Chicago)08/05/2023, 18:00
Cosmological parity violation offers a unique way to probe the primordial non-Gaussianity. Recent studies have indicated that measuring parity-violating signals from large-scale structure observations are possible. These signals can arise naturally through the exchange of heavy spinning particles, with chemical potential enhancement, during cosmic inflation. In this talk, we will present a...
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Zhangqier Wang (Massachusetts Inst. of Technology (US))08/05/2023, 18:00Dark Matter
Several BSM predicted particles could give rise to resonant particle pair production. We will present the results of a search for prompt low-mass dimuon resonances based on proton-proton collision data at a center-of-mass energy of 13 TeV collected by CMS. The search exploits a high-rate trigger ("scouting") stream to record events with two muons and looks for narrow peaks in the dimuon mass...
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Dawid Brzeminski (University of Maryland - College Park)08/05/2023, 18:00Axion and ALP
We consider the general class of theories in which there is a new ultralight scalar field that mediates an equivalence principle violating, long-range force. In such a framework, the Sun and Earth act as sources of the scalar field, leading to potentially observable location-dependent effects on atomic and nuclear spectra. We determine the sensitivity of current and next-generation atomic and...
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Seth Koren08/05/2023, 18:00BSM
Models of particle physics that you care about have generalized symmetries, and understanding them can lead to new insights into these theories. I'll give a brief overview of the sorts of questions one might try to address with this technology.
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Mr Noah Donald (William & Mary)08/05/2023, 18:15BSM
We propose an asymptotically safe extension of the standard model with gauged baryon number that is spontaneously broken at the TeV scale. Among the new heavy fermions is a potential dark matter candidate which is rendered stable by an unbroken $Z_2$ subgroup of the baryon number gauge group. After taking into account gravitational effects above the Planck scale, we study the ultraviolet fixed...
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Dorian Amaral (Rice University)08/05/2023, 18:15Dark Matter
Dark matter may exist as an ultralight bosonic particle, leading to the formation of an ever-present field that could interact with us via a new long-range fifth force. Recently, quantum sensing techniques have been shown to be promising avenues with which to detect such a dark matter candidate. However, these studies did not entirely capture the stochastic nature of the field, which is...
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Kevin Zhou (Stanford/SLAC)08/05/2023, 18:15Axion and ALP
The QCD axion is a well-motivated extension of the Standard Model which dynamically relaxes away strong CP violation. However, to date most searches for the axion have instead focused on its model-dependent coupling to photons. I will present a new idea for axion detection that directly targets its defining coupling to gluons, by resonantly amplifying the oscillating currents from time-varying...
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Katarina Bleau (Queen's University)08/05/2023, 18:15BSM
A weakly coupled and light dark photon coupling to lepton charges $L_\mu-L_\tau$ is an intriguing dark matter candidate that could modify the dynamics of neutrino flavor conversions. By analyzing data from the T2K, SNO, and Super-Kamiokande experiments, limits are obtained on the dark photon gauge coupling for masses below $\sim 10^{-11}\,\mathrm{eV}$. Degeneracies between shifts in the...
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John Patrick Mc Gowan (ATLAS)08/05/2023, 18:15
Measurements of multiboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions for anomalous gauge couplings. Processes involving quartic gauge couplings have become experimentally accessible at the LHC. We present recent ATLAS results of vector-boson scattering in the Zgamma channel, where the Z boson decays to neutrinos producing missing...
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Hannah Day08/05/2023, 18:15
Neural networks (NNs) have gained significant attention in the physics community because of their ability to find non-trivial patterns in large datasets. However, developing a theory of NN learning has proven to be quite challenging because of the vast number of degrees of freedom in a typical NN. But fortunately, statistical field theory already provides tools for analyzing similar many-body...
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Victor Baules08/05/2023, 18:15BSM
We consider a classically conformal $U(1)$ extension of the Standard Model (SM). The $U(1)$ symmetry is radiatively broken by the Coleman-Weinberg mechanism, after which the $U(1)$ Higgs field $\phi$ drives electroweak symmetry breaking through a mixed quartic coupling with the SM Higgs doublet with coupling constant λmix. The conformal system features a suppressed coupling $g_{h_{1} h_{2}...
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Yingsheng Huang (Northwestern University & Argonne National Laboratory)08/05/2023, 18:30BSM
We study the impact of LHC forward-backward asymmetry (AFB) measurements at high invariant mass in the Drell-Yan process on probes of semi-leptonic four-fermion operators in the Standard Model effective field theory (SMEFT). In particular, we study whether AFB measurements can resolve degeneracies in the Wilson coefficient parameter space that appear when considering invariant mass and...
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Christopher Cappiello08/05/2023, 18:30Dark Matter
Although searches for GeV-scale WIMPs are sensitive to very small cross sections, constraints on sub-GeV dark matter are significantly weaker, and largely constrain moderately- or strongly-interacting dark matter. But if dark matter interacts too strongly with nuclei, it could be slowed to undetectable speeds in Earth’s crust or atmosphere before reaching a detector. For sub-GeV dark matter,...
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Dr Sandra Kvedaraite08/05/2023, 18:30BSM
We construct an effective field theory for non-relativistic heavy dark matter of arbitrary spin based on the Little group formalism. We present the most general HDMEFT basis up to dimension seven involving scalar (spin 0), vector (integer spin) and fermionic (half-integer spin) dark matter fields. We also discuss the matching onto the non-relativistic EFT.
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Saarik Kalia (University of Minnesota)08/05/2023, 18:30Axion and ALP
Ultralight bosonic particles, including axionlike particles and kinetically mixed dark photons, can be promising dark matter candidates. It was recently shown that the Earth can act as a transducer for ultralight dark matter detection, by converting the dark matter into an oscillating monochromatic magnetic field signal across the Earth's surface. This occurs because the ground and...
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Sung Hak Lim (Rutgers University)08/05/2023, 18:30
Measuring the density profile of dark matter in the Solar neighbourhood has important implications for both dark matter theory and experiment. In this work, we apply autoregressive flows to stars from a realistic simulation of a Milky Way-type galaxy to learn – in an unsupervised way – the stellar phase space density and its derivatives. With these as inputs, and under the assumption of...
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Ameen Ismail08/05/2023, 18:30BSM
I will describe some dark matter models, based mainly on 2210.16326, where the dark matter is described by a gapped continuum, rather than by ordinary particles. The unique kinematics of continuum states leads to a strong suppression of direct detection cross sections, rendering minimal WIMP-like continuum $Z$-portal models phenomenologically viable. Continuum states can decay to lighter...
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Dr Josh Sayre ((Phys. Rev. D))09/05/2023, 08:40
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Prof. George W.-S. Hou ((National Taiwan Univ.))09/05/2023, 08:45
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Conor Henderson ((Cincinnati))09/05/2023, 09:20
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Prof. Paddy Fox ((Fermilab))09/05/2023, 09:55
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Rebecca Leane ((SLAC))09/05/2023, 11:00
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Prof. Lina Necib ((MIT))09/05/2023, 11:35
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Prof. Andrew Long ((Rice U.))09/05/2023, 12:10
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Edward Ramirez09/05/2023, 14:00Dark Matter
We use a catalogue of stellar binaries with wide separations (up to 1 pc) identified by the Gaia satellite to constrain the presence of extended substructure within the Milky Way galaxy. Heating of the binaries through repeated encounters with substructure results in a characteristic distribution of binary separations, allowing constraints to be placed independent of the formation mechanism...
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Nicole Crumpler09/05/2023, 14:00
We constrain a broad class of “hairy” black hole models capable of directly sourcing electromagnetic radiation. We assume this emission is triggered by a catastrophic event, such as a binary black hole merger. This signal is generic and model-independent since it depends only on the black hole mass and the proportion of that mass released as radiation (denoted by $\epsilon$). In the most...
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Navin McGinnis09/05/2023, 14:00BSM
New gauge forces in nature are among the most well-studied proposed ingredients for particle models of the dark sector. The popularity of such scenarios is driven by the simplicity of the low-energy effective theory needed to describe the associated phenomenology ranging from collider physics, astrophysical systems, and physics of the early universe. However, the origin of the parameters in...
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Lukas Allwicher (University of Zurich)09/05/2023, 14:00BSM
The study of high-$p_T$ tails at the LHC can be a complementary probe to low-energy observables when investigating the flavour structure of the Standard Model and its extensions. The Mathematica package HighPT allows to compute Drell-Yan cross-sections for dilepton and monolepton final states at the LHC. The observables can be computed at tree-level in the SMEFT, including the relevant...
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RICARDO ALEXANDRE DOS SANTOS XIMENES FILHO (University of Wisconsin - Madison)09/05/2023, 14:00BSM
The paradigm of portal matter represents a well-motivated extension to models with kinetic mixing/vector portal dark matter. We present a minimal toy model construction using leptonic portal matter that addresses the muon $g-2$ anomaly through chiral enhancement. We further explore a realization of this construction with an extended dark gauge sector in which SM and portal matter fields exist...
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Shuo Han (Lawrence Berkeley National Lab. (US))09/05/2023, 14:00Higgs
The event rates and kinematics of Higgs boson production and decay processes at the LHC are sensitive probes of possible new phenomena beyond the Standard Model (BSM). This talk presents precise measurements of Higgs boson production and decay rates, obtained using the full Run 2 and partial Run 3 pp collision dataset collected by the ATLAS experiment at 13 TeV and 13.6 TeV. These include...
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Takuya Okawa09/05/2023, 14:00Axion and ALP
Axion-like particles (ALPs) coupled to photons are produced inside stars via the Primakoff process and photon coalescence. They spontaneously decay into two gamma-ray photons that escape from the stellar interior only if decays occur outside the photosphere. Owing to their hot and dense plasma and small radius of the photosphere, horizontal branch stars are promising astrophysical objects to...
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Valentina Dutta (Carnegie-Mellon University (US))09/05/2023, 14:00BSM
The constituents of dark matter are still unknown, and the viable possibilities span a very large mass range. Specific scenarios for the origin of dark matter sharpen the focus on a narrower range of masses: the natural scenario where dark matter originates from thermal contact with familiar matter in the early Universe requires the DM mass to lie within about an MeV to 100 TeV. Considerable...
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Prof. Roland Allen (Texas A&M University)09/05/2023, 14:15BSM
A new fundamental theory [1] unavoidably predicts supersymmetry, SO(N) grand unification, and a new description of all fundamental scalar bosons. As discussed in our previous papers [2-5] and many recent talks, this last feature in turn unavoidably predicts a dark matter WIMP which is consistent with all experimental and observational constraints, and which should be observable via direct...
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Mr Torrey Saxton (University of Notre Dame)09/05/2023, 14:15BSM
We present bounds on 5D theories that have a mass gap followed by a continuous spectrum. These theories involve a metric with a warp factor and are controlled by a single parameter ρ. Using Drell-Yan data simulated from MadGraph, Pythia8, and Delphes for charged lepton and dilepton events we perform a χ2 analysis for the differential cross section predicted by the 5D theory and measured by the...
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Max Fieg09/05/2023, 14:15BSM
Neutral particles are notoriously difficult to observe through electromagnetic
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interactions. As a result, they naturally elude detection in most collider detectors. In this talk, I will point out that neutral particles that interact through a
dipole interaction can nevertheless be detected in far-forward detectors
designed to search for long-lived particles (LLPs). In contrast to... -
SHU TIAN EU09/05/2023, 14:15BSM
The paradigm of portal matter represents a well-motivated extension to models with kinetic mixing/vector portal dark matter. In previous work, we constructed a simple leptonic portal matter model in which the portal matter fields could mediate a new physics correction to the anomalous magnetic moment of the muon consistent with the observed discrepancy between the measured value for this...
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Eric Putney09/05/2023, 14:15Dark Matter
Density estimation utilizing normalizing flows enables novel data-driven analyses of galactic dynamics. We train Masked Autoregressive Flows on the kinematic coordinates of 6 million nearby bright stars from the Gaia DR3 catalog within 4 kpc of the Solar location to learn their underlying phase space distribution f(x,v). Assuming dynamic equilibrium, we use f to estimate the local acceleration...
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Vivan Nguyen (Northeastern University (US))09/05/2023, 14:15
We discuss the latest status of searches for nonresonant di-Higgs production with the CMS detector. In addition to the analysis strategy and limits on the production cross section of this process, constraints on the Higgs boson self-coupling and the coupling between two Higgs bosons and two vector bosons will be presented.
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Zack Gelles (Princeton University)09/05/2023, 14:15
The black hole images released by the Event Horizon Telescope have opened up a multitude of opportunities to improve our understanding of gravity in strongly curved spacetimes, as well as elucidate the dynamics of turbulent plasma. In this talk, I will connect these two phenomena by demonstrating that the intrinsic variability of reconnection-driven flares in the accretion flow can introduce...
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Erwin Tanin (Johns Hopkins University)09/05/2023, 14:15Axion and ALP
Recent studies reveal that more than a dozen of white dwarfs displaying near-perfect blackbody spectra in the optical range have been lurking in the Sloan Digital Sky Survey catalog. We point out that, in a way analogous to the Cosmic Microwave Background, these stars serve as excellent testbeds for new physics. Specifically, we show how their observed lack of spectral distortions translate...
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Tao Xu09/05/2023, 14:30Axion and ALP
Asteroid-mass primordial black holes (PBH) can make up a fraction or all of dark matter. Their Hawking radiation process offers a novel channel to produce new particles, which is especially interesting if these particles are mostly secluded from the Standard Model sector. Future gamma-ray experiments, such as the e-ASTROGAM and AMEGO telescopes, provide exciting prospects for detecting the...
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Peizhi Du09/05/2023, 14:30BSM
Dopant atoms in semiconductors can be ionized with ∼ 10 meV energy depositions, allowing for the design of low-threshold detectors. We propose using doped semiconductor targets to search for sub-MeV dark matter scattering or sub-eV dark matter absorption on electrons. In this talk, I will show that currently unconstrained cross sections could be tested with a 1 g-day exposure in a doped...
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Lorenzo Ricci09/05/2023, 14:30BSM
Flavor and CP violating observables strongly constrain new Physics at the TeV scale. This is the case for Composite Higgs models, where “standard” constructions only partially screen
dangerous flavor effects, pushing up the new physics scale far from the LHC reach.Specific assumptions for the flavor structure of the composite sector suppress unwanted effects, allowing for a lower new...
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Luca Franco (ATLAS)09/05/2023, 14:30Higgs
This talk presents precise measurement of the properties of the Higgs boson, including its mass, total width, spin, and CP quantum number. The measurements are performed in various Higgs boson production and decay modes, as well as their combinations. Observation of deviations between these measurements and Standard Model (SM) predictions would be a sign of possible new phenomena beyond the SM
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Mr Tom Schwemberger09/05/2023, 14:30Dark Matter
We demonstrate the ability of future dark matter experiments to probe beyond the standard model (BSM) effects in neutrino scattering of solar and atmospheric origin in models with heavy scalar and vector mediated interactions. Mapping the effective four-Fermi vertex of a scalar NSI to the well studied model of leptoquarks, we find that near future detectors can probe parameter space beyond the...
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Dorival Gonçalves (Oklahoma State University)09/05/2023, 14:30BSM
Observation of lepton number (L) violation by two units at colliders would provide evidence for the Majorana nature of neutrinos. We study signals of L-violation in the context of two popular models of neutrino masses, the type-II seesaw model and the Zee model, wherein small neutrino masses arise at the tree-level and one-loop level, respectively. We focus on L-violation...
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Mudit Jain09/05/2023, 14:30
I will describe spatially localized Bose Einstein condensates (BECs) composed of non-zero spin particles, that carry huge amounts of intrinsic spin angular momentum. Such objects are naturally present in the spectrum of a massive integer spin field theory admitting attractive self-interactions, and are relevant both in cosmology and laboratory setups. In the cosmological scenario, they are...
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Xiaowei Ou09/05/2023, 14:30Dark Matter
The circular velocity curve, one of the first pieces of evidence for dark matter (DM), is a direct probe of the Galaxy’s potential, which allows studies of the nature of DM. Recent large surveys have provided valuable information for determining the Milky Way circular velocity curve. In this talk, I will describe our newly-derived circular velocity curve of the Milky Way out to ~30 kpc, which...
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Luigi Favaro09/05/2023, 14:45BSM
Autoencoders are an effective analysis tool for model-agnostic searches at the LHC. Unfortunately, it is known that their OOD detection performance is not robust and heavily depends on the compressibility of the signals. Even if a neural network can learn the physical content of the low-level data, the gain in sensitivity to features of interest can be hindered by redundant information already...
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Yilda Boukhtouchen (Queen’s University)09/05/2023, 14:45Dark Matter
In this talk, we discuss a baryonic feedback mechanism induced by dark matter ignition of white dwarf populations, and its potential effects on galaxy evolution and star formation. Previous works have shown that Type Ia supernova ignitions of sub-Chandrasekhar white dwarfs may be caused by asymmetric dark matter captured within white dwarfs, leading to the formation and subsequent collapse of...
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Jan Schütte-Engel09/05/2023, 14:45
The thermal plasma in the early universe produced a stochastic gravitational wave (GW) background, which peaks today in the microwave regime and was dubbed the cosmic gravitational microwave background (CGMB). In previous works only single graviton production processes that contribute to the CGMB have been considered. In this talk we also investigate graviton pair production processes and show...
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Peiran Li (University of Minnesota)09/05/2023, 14:45BSM
The future high-energy muon colliders, featuring both high energy and low background, could play a critical role in our searches for new physics. The smallness of neutrino mass is a puzzle of particle physics. Broad classes of solutions to the neutrino puzzles can be best tested by seeking the partners of SM light neutrinos, dubbed as heavy neutral leptons (HNLs), at muon colliders.
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We can... -
vishnupk Padmanabhan Kovilakam09/05/2023, 14:45BSM
We present a minimal UV-complete model for sub-GeV thermal Dark Matter (DM) that primarily interacts with neutrinos and contributes to the generation of neutrino masses and mixings through quantum loop corrections at the one-loop level. In this configuration, DM can solely annihilate into SM neutrinos without affecting the Cosmic Microwave Background anisotropies. We find that the rate of...
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Aparajitha Karthikeyan (Department of Physics and Astronomy, Texas A&M University)09/05/2023, 14:45BSM
We utilize photon and charged meson fluxes at proton beam targets to produce long lived particles (LLPs) via scattering and decay mechanisms. These particles encompass light scalars and gauge bosons that appear in theories like extended Higgs sectors, $U(1)_{L_{\mu}-L_{\tau}}$, $U(1)_{T_{3R}}$ etc. We look at the sensitivities of the above in the context of experiments like ArgoNeuT,...
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Dr Subhajit Ghosh (University of Notre Dame)09/05/2023, 14:45Axion and ALP
We study the cosmological signatures of a completely secluded dark sector consisting of axion-like particles (ALPs) with anomalous coupling to a dark Abelian gauge boson. The lighter ALP starts rolling during matter domination and produces dark photons through tachyonic instabilities. The resulting exponential growth in dark photon quanta sources tensor and scalar perturbations which are...
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Christina Dimitriadi (ATLAS)09/05/2023, 14:45Higgs
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
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Roy Forestano09/05/2023, 15:00BSM
We design a deep-learning algorithm for the discovery and identification of the continuous group of symmetries present in a labeled dataset. We use fully connected neural networks to model the symmetry transformations and the corresponding generators. We construct loss functions that ensure that the applied transformations are symmetries and that the corresponding set of generators forms a...
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Shuyang Cao (University of Pittsburgh)09/05/2023, 15:00Axion and ALP
We studied the non-equilibrium dynamics of an axion-like particle (ALP) weakly coupled to a thermal bath and misaligned initial conditions. The ALP’s evolution is studied to leading order in the ALP coupling to the bath but to all orders in couplings among the bath’s degrees of freedom. Results are obtained using both Langevin equation derived from in-in formalism and quantum master equation,...
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Jacqueline Lodman (Harvard University)09/05/2023, 15:00
Curvatons are light (compared to Hubble during inflation) spectator fields that potentially contribute adiabatic curvature perturbations post-inflation. They can thereby alter CMB observables such as the spectral index $n_s$, the tensor-to-scalar ratio $r$, and the local non-Gaussianity $f_{\rm NL}^{\rm (loc)}$. We systematically explore the observable space of a curvaton with a quadratic...
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Samuel Lane (KAIST)09/05/2023, 15:00
Many new physics scenarios predict multi-photon Higgs resonances. One such scenario is the dark axion portal. The primary decay chain that we study is the Higgs to dark photon ($\gamma_D$) pairs that subsequently decay into a photon and an axion-like particle ($a$). The axion-like particles then decay into photon pairs. Hence, the signal is a six-photon Higgs decay: $h\rightarrow...
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Dr Andrey Shkerin (University of Minnesota)09/05/2023, 15:00
Dark matter particles can form halos gravitationally bound to massive astrophysical objects. The Earth could have such a halo where depending on the particle mass, the halo either extends beyond the surface or is confined to the Earth's interior. We consider the possibility that if dark matter particles are coupled to neutrinos, then neutrino oscillations can be used to probe the Earth's dark...
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Joshua Forsyth09/05/2023, 15:00BSM
Exploring less studied signals of beyond the standard model physics can optimize the LHC's discovery potential and address open questions. Quirks are particles charged under a new $SU(N)$ color group with masses much larger than their confinement scale. This makes their collider signal qualitatively different from many standard searches and leads to interesting signals. I outline families of...
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Ariel Rock09/05/2023, 15:00BSM
As the planning stages for a high energy muon collider enter a more concrete era, an important question arises as to what new physics could be uncovered. A TeV-scale muon collider is also a vector boson fusion (VBF) factory with a very clean background, and as such it is a promising environment to look for new physics that couples to the electroweak (EW) sector. In this paper, we explore the...
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Thomas Gehrman (University of Oklahoma)09/05/2023, 15:00
Light primordial black holes(PBHs) form in the early universe through a variety of formation mechanisms. These PBHs can Hawking evaporate before BBN to produce SM particles and in our scenario also generate the dark matter(DM) relic abundance. High frequency gravitational waves in the MHz-GHz regime are produced during the formation of these light PBHs. In this talk I will present two...
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Andrew Wesley Gomes09/05/2023, 15:15
Recently it has been demonstrated that anomaly-mediated supersymmetry breaking (AMSB) is a valuable tool for understanding the low-energy phases of non-SUSY gauge theories. For example, applying AMSB to SUSY SU(N) gauge theories with quarks in the fundamental leads to scalar potentials with chiral symmetry breaking minima. Furthermore, the application of AMSB to a class of SUSY SO(N) gauge...
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Dr Chen Sun (Los Alamos National Laboratory)09/05/2023, 15:15Axion and ALP
In this talk I will first discuss how rotation-dominated galaxies can be used to constrain the size of solitons inside galaxy dark matter halos. I will discuss how this confronts the theoretical expectation, which leads to a robust constraint on the fraction of ultralight dark matter in a wide mass range from 10^{-24} eV to 10^{-20} eV. I will then discuss how this bound is affected by the...
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Prisco Lo Chiatto (JGU Mainz / PRISMA+)09/05/2023, 15:15BSM
Studies of entanglement and other quantum information measures at colliders have recently been proposed to probe fundamental interactions at high energies. Inspired by these results, we examine tau pair productions at both lepton and hadron colliders, to probe dimension-6 dipole operators in the Standard Model Effective Field Theory (SMEFT).
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The SMEFT contributions are found to be sizable in... -
Yulun Li09/05/2023, 15:15
We investigate the decay of MeV-scale sterile neutrinos into e+e- pairs, which is a signature that can be exploited by current solar neutrino and future dark matter experiments to set stringent limits in mass-mixing parameter space. We present a closed-formed cross-section correctly accounting for the neutral/charged current interference and rederive Borexino bounds based on this result. We...
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Wenjie Huang09/05/2023, 15:15BSM
Modern-day accelerator neutrino facilities are excellent venues for searches for new-physics particles. Many distinct new-physics models predict overlapping signatures and phenomenology in these experiments. In this work, we advocate for the adoption of simplified frameworks when studying these types of new-physics signatures, which are characterized by a small number of primary variables,...
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Sarah Geller (MIT)09/05/2023, 15:15
In my talk, I will present recent significant work on the formation of primordial black hole dark matter and the resultant
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gravitational wave signal, drawing from the results of arXiv:2303.02168, with co-authors
W. Qin, S. Balaji, D.I. Kaiser, and E. McDonough, which has been submitted for peer review to Phys. Rev. D. My talk will also build on our previous results as published in... -
Hailin Xu09/05/2023, 15:15Dark Matter
We consider halo dark matter particles whose energy is boosted by colliding with the hot solar plasma. This “solar-reflected” dark matter (SRDM) halo component extends the sensitivity of terrestrial direct detection experiments to lower dark matter masses. In this study, we use a Monte-Carlo simulation to model the propagation and scattering of dark matter particles. We study the properties of...
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Nina Elmer (Heidelberg University)09/05/2023, 15:15Higgs
We present an updated global SMEFT analysis in the Higgs and Electroweak sectors using the SFitter framework. We use a newly implemented marginalization procedure that allows comparison of Wilson coefficient results between profiling and marginalization methods. Marginalization is motivated by better scalability for high-dimensional analyses and provides faster numerical convergence compared...
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Alberto Navarro09/05/2023, 15:30
The Large Hadron Collider provides an excellent environment to study quantum entanglement and Bell's inequality at high energies. We explore the possible observation of entanglement and violation of Bell's inequality in the semi-leptonic channel of top quark pair production. We show that boosted top quarks are required to ensure they are spacelike separated. The density matrix of the top-pair...
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Melissa Diamond09/05/2023, 15:30
Compact transients such as supernovae and binary neutron star mergers can produce enormous fluxes of exotic particles. One way to look for them is through fireballs, a dense expanding photon electron plasma formed when exotic particles escaping a compact source quickly decay to Standard Model particles. Fireballs produce a unique signal, allowing us to observe new parts of dark photon and...
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Anupam Ray09/05/2023, 15:30
Dark Matter (DM) remains mysterious. Despite decades of experimental efforts, its microscopic identity is still unknown. Terrestrial detectors are placing stringent exclusions on various parts of the DM parameter space, however, there exist a few blind-spots. In this talk, I will demonstrate how existing GW detectors can be used to unravel the particle nature of DM. More specifically, by...
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Mr Mehrdad Phoroutan-Mehr (University of California, Riverside (UCR))09/05/2023, 15:30Dark Matter
Our research focuses on studying the heating mechanism of neutron stars through the capture of inelastic dark matter. Due to the high density of neutron stars, infalling dark matter particles are accelerated to relativistic speeds. To analyze the scattering between ultra-relativistic targets in the neutron star and quasi-relativistic infalling dark matter, we employ relativistic kinematics....
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Jaipratap Grewal09/05/2023, 15:30BSM
MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) is a proposed detector at the LHC to search for Long Lived Particles (LLP). We present various trigger and efficiency studies crucial to determining the final design and sensor geometry of the detector. We also present exclusion plots for BSM models taking into account the actual expected geometric acceptance of MATHUSLA.
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Margaret Susan Lutz (ATLAS)09/05/2023, 15:30BSM
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures which are difficult to reconstruct and for which estimating the background rates is also a challenge. Signatures from displaced and/or delayed decays anywhere from the inner detector to the muon spectrometer, as well as those of new particles with fractional or multiple values of the charge of...
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Maeve Madigan09/05/2023, 15:30BSM
I will present a study of the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available measurements based on the full Run II luminosity. First, we determine the constraints that...
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Dr Innes Bigaran (Fermilab and Northwestern University)09/05/2023, 15:30BSM
Motivated by flavour symmetry models, one may construct theories based on a low-energy limit featuring lepton flavour triality that have the flavour-violating decays $\tau^\pm \to \mu^\pm \mu^\pm e^\mp$ and $\tau^\pm \to e^\pm e^\pm \mu^\mp$ as the main phenomenological signatures of BSM physics. These decay modes are expected to be probed in the near future with increased sensitivity by the...
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I-Kai Chen, Marius Kongsore (University of Michigan (US))09/05/2023, 15:45
The Gaia satellite is cataloging the astrometric properties of an unprecedented number of stars in the Milky Way with extraordinary precision. This provides a gateway for conducting extensive surveys of transient astrometric lensing events caused by dark compact objects. In this work, we establish a data analysis pipeline capable of searching for such events in the upcoming Gaia Data Release 4...
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Tong Ou09/05/2023, 15:45BSM
We show that simultaneously explaining dark matter and the observed value of the muon's magnetic dipole moment may lead to yet unexplored photon signals at the LHC. We consider the Minimal Supersymmetric Standard Model with electroweakino masses in the few-to-several hundred GeV range, and opposite sign of the Bino mass parameter with respect to both the Higgsino and Wino mass parameters. In...
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Narayani Tyagi (Queen's University)09/05/2023, 15:45Dark Matter
This study investigates the capture and thermalization of inelastic dark matter outside neutron stars. While the possibility of capture, thermalization and annihilation has been studied in some detail in the literature, this has assumed dark matter thermalizes to a trajectory lying inside neutron stars. I will show that some inelastic dark matter models imply thermalization timescales long...
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Rafiqul Rahaman (Harish-Chandra Research Institute, Prayagarj, India)09/05/2023, 15:45BSM
We study the anomalous $t\bar{t}Z$ couplings in the $t\bar{t}Z$ production in leptonic final state at the $13$ TeV LHC. We use the polarizations of top quarks and $Z$ boson, two-body and three-body spin correlations among the top quarks and $Z$ boson, and the cross section to probe the anomalous couplings. We estimate one parameter and simultaneous limits on the couplings of the effective...
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Carlos Henrique de Lima (Carleton University)09/05/2023, 15:45BSM
In this work, we study the status of negative coupling modifiers in extended Higgs sectors, focusing on the ratio of coupling modifiers that probes custodial symmetry violation $\lambda_{WZ} = \kappa_{W}/\kappa_{Z}$. Higgs sectors with multiplets larger than doublets are the only weakly coupled models that give tree-level modifications to $\lambda_{WZ}$, and we explore all such models allowed...
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Gonzalo Alonso Alvarez (McGill University), Gonzalo Alonso-Álvarez (McGill University)09/05/2023, 15:45
There exists a whole landscape of QCD axion models. However, if this particle is to make up the dark matter, the absence of catastrophic domain walls and exotic strongly interacting relics singles out two minimal versions of hadronic axions as the only viable possibilities. I argue that these models generically predict sizeable flavor-violating axion couplings to quarks that can be probed at...
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Zhihan (Linda) Yuan09/05/2023, 15:45
Abstract: The Twin Higgs framework is a solution to the hierarchy problem that is compatible with LHC null results for colored top partner searches. The Higgs mass is stabilized via a hidden sector related to the SM by a Z2 symmetry that is softly broken in the IR to give the hidden Higgs a larger vev f, with f/v ~ 3-7 in the natural range. The Minimal Twin Higgs has an unacceptable...
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Elias Bernreuther (Fermilab)09/05/2023, 15:45BSM
Long-lived particles are a prime target of searches in current and upcoming LHC runs. In my talk, I will discuss a renormalizable theory that includes a heavy weak-singlet vectorlike lepton that decays into a long-lived pseudoscalar boson and a tau lepton. I will show that this can be the dominant decay mode of the vectorlike lepton provided the pseudoscalar couplings deviate from the case of...
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Ian Lewis (The University of Kansas)09/05/2023, 16:30
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Mr Biswajit Padhi (Colorado State University)09/05/2023, 16:30
When gravitational waves propagate through a medium with a changing equation of state, their spectrum distorts. A changing equation of state results from massive particles decoupling from the cosmic plasma as the temperature decreases. For low-frequency stochastic gravitational waves, this leads to deviations from the standard $k^3$ scaling. Interestingly, low-frequency waves emitted from...
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Garv Chauhan (Virginia Tech)09/05/2023, 16:30BSM
Sterile neutrinos can be produced through mixing with active neutrinos in the hot and dense core of a collapsing supernova (SN). The standard SN bounds on the active-sterile mixing ($\theta$) arise from the SN1987A energy-loss argument. In this talk, I will discuss a novel and stringent bound on $\theta$ arising from the energy deposition through the decays of sterile neutrinos inside the SN envelope.
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Brent Yates (Ohio State University (US))09/05/2023, 16:30BSM
The top quark is hypothesized in many BSM models to have enhanced, non-standard or rare interactions with other SM or BSM particles. This presentation covers the latest CMS direct results in this regard, including the tests of lepton flavor violations and baryon number violations. It does not cover FCNC searches.
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Shuailiang Ge (Peking University)09/05/2023, 16:30Dark Matter
Ultralight axions and dark photons are compelling candidates for dark matter. In this talk, I will provide an overview of my recent work (arXiv:2207.05767, 2301.03622) on detecting radio-frequency axions and dark photons using radio telescopes. The detectability relies on two distinct underlying mechanisms. One mechanism involves local dark photon dark matter inducing harmonic oscillations of...
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Ngan Nguyen09/05/2023, 16:30Axion and ALP
We characterize in detail the diffuse axion background sourced by all the stars in the universe throughout the cosmic history and discuss the feasibility of probing this background via its decay to X-ray. We focus on main sequence stars and base our calculations on the stellar interior profiles from MESA along with recent models of star formation history and stellar initial mass function.
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Dr Matthew Sullivan (Brookhaven National Laboratory)09/05/2023, 16:30BSM
The Standard Model effective field theory (SMEFT) is a standard tool for parametrizing the effects of new physics. The ordiinary approach to SMEFT is to use the truncation at dimension-6, which would typically be the leading contribution beyond the Standard Model. We perform the matching to dimension-8 in the two-Higgs-doublet model (2HDM) and critically examine the dimension-6 and dimension-8...
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GEORGE WOJCIK09/05/2023, 16:30
Within the general framework of using spontaneous CP violation to solve the strong CP problem, we construct a variant Nelson-Barr model in which the Standard Model (SM) quark contribution to the strong CP phase is cancelled by new heavy QCD-charged fermions. This cancellation is ensured by choosing conjugate representations for the new colored states under the same global flavor symmetry of SM...
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Amarjit Soni09/05/2023, 16:45BSM
Due to naturalness arguments we must continue our quest for CPV at all
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frontiers. This is of course esp. so @ LHC. New experimental efforts with
additional expt. + theory inputs will be highlighted. -
Javier Acevedo (SLAC)09/05/2023, 16:45Dark Matter
The minimum testable dark matter (DM) mass for almost all DM signatures in celestial bodies is determined by the rate at which DM evaporates. DM evaporation has previously been calculated assuming a competition between the gravitational potential of the object, and thermal kicks from the celestial-body matter. I will point out a new effect, where mediators with a range larger than the...
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Itamar J. Allali09/05/2023, 16:45
Light dark relativistic sectors may undergo changes in the number of their relativistic species during the cosmological history (due e.g. to mass thresholds and/or phase transitions), similarly to the visible sector. When such changes occur around recombination, the stringent bound on the effective number of neutrino species, $N_{eff}$, can be relaxed and the value of the Hubble rate inferred...
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Arindam Bhattacharya09/05/2023, 16:45BSM
Froggatt Nielsen (FN) mechanism, when employed to explain the SM flavor hierarchy, introduces a systematic power counting for BSM physics couplings in the IR. While the power counting in the IR is generally robust to UV details, nonetheless there can be visible deviations from a naïve FN counting owing to specificities of the underlying UV model. In this work, we propose a systematic way to...
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Margarita Gavrilova (Cornell)09/05/2023, 16:45BSM
Pulsar binaries can be used for robust probes of new physics. There are two main reasons for this. First, there exists an abundance of high precision experimental data on orbital period decays of pulsar binaries. Second, pulsars are extreme astrophysical objects for which BSM effects can be significantly enhanced by large particle number densities. In my talk, I will discuss the use of pulsar...
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Pablo Matorras-Cuevas (Instituto de Física de Cantabria (ES))09/05/2023, 16:45BSM
The latest results from searches for electroweak production of SUSY particles with the CMS experiment will be presented. The analyses are based on the full dataset of pp collisions recorded at sqrt(s) = 13 TeV during the LHC Run 2. Searches are performed in multiple final states and the combination of those searches will be also discussed.
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Kevin Langhoff (UC Berkeley)09/05/2023, 16:45
Searches for dark matter decaying into photons constrain its lifetime to be many orders of magnitude larger than the age of the Universe. A corollary statement is that the abundance of any particle that can decay into photons over cosmological timescales is constrained to be much smaller than the cold dark-matter density. We show that an irreducible freeze-in contribution to the relic density...
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Edward Broadberry (University of Maryland, College Park)09/05/2023, 17:00Axion and ALP
We introduce a mechanism by which a misaligned ALP can be dynamically converted into a dark photon in the presence of a background dark magnetic field. An abundance of non-relativistic ALPs will produce dark photons with momentum of order the inhomogeneities in the background field; therefore a highly homogeneous field will produce non-relativistic dark photons without relying on any...
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Kirtimaan Ajaykant Mohan09/05/2023, 17:00
Parton distribution functions (PDFs) form an essential part of particle physics calculations. Currently, the most precise predictions for these non-perturbative functions are generated through fits to global data. One difficulty that several PDF fitting groups encounter is the presence of tension in data sets that appear to pull the fits in different directions. Several methods to capture the...
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Gregory Suczewski (YITP, Stony Brook University)09/05/2023, 17:00
Primordial black holes (PBHs) are a well motivated, macroscopic alternative to particle-like dark matter. If present in the early universe, PBHs will accrete matter, producing high energy photons. The injection of high energy photons during the Dark Ages affects the thermal and ionization histories of the universe, leading to noticeable impacts on the CMB power spectra. In this talk, I will...
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Kunfeng Lyu (University of Minnesota)09/05/2023, 17:00BSM
We consider a model with a complex scalar field that couples to $(e,\mu)$ or $(\mu,\tau)$ within the ``longevity" window: $[|m_{l_1} - m_{l_2}|, m_{l_1} + m_{l_2}]$ in which $l_1$ and $l_2$ are the two different charged leptons. Within such a mass window, even a relatively large coupling ({\em e.g.} of the size commensurate with the current accuracy/discrepancy in the muon $g-2$ experiment)...
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Leo Kim09/05/2023, 17:00Dark Matter
A dissipative dark sector can result in the formation of astrophysical compact objects. In this work, we investigate the formation of exotic compact objects assuming a subdominant inelastic dark matter model, and study the resulting landscape of these objects. Inelastic transitions introduce radiative processes which can impact the formation of compact objects via mutliple cooling channels. In...
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Robert Gustafson (Virginia Tech)09/05/2023, 17:00
The nuclear processes within the sun could lead to the production of Beyond the Standard Model (BSM) particles of MeV scale. If these particles are long-lived, they could escape from the Sun and decay into observable particles en route to the Earth.
We use data available from the RHESSI Spectrometer to explore scenarios involving these solar long-lived particles. In particular, we...
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Samuel Kai Bright-Thonney (Cornell University (US))09/05/2023, 17:00BSM
A new paradigm for dark matter searches, allows to focus not only on the coupling between dark matter and the Standard Model, but also on the interactions between dark matter constituents themselves. The LHC is in a unique position to investigate such a rich dark sector which is otherwise difficult to probe with direct and indirect detection techniques. In this talk, a recently published...
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Ishmam Mahbub (University of Minnesota Twin Cities)09/05/2023, 17:00Higgs
Top Yukawa coupling is deeply connected to many fundamental puzzles in Higgs and Electroweak physics. In this study, we seek to measure the Top Yukawa coupling at the future high-energy muon colliders utilizing the Higgs unitarization in the $V_L V_L \rightarrow t\bar{t} $ process. If the Top Yukawa coupling
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deviates from the Standard Model (SM) value, the amplitude of the
processes with... -
Dipan Sengupta (University of Adelaide, Australia)09/05/2023, 17:15BSM
We provide a comprehensive analysis of constraints on Supersymmetric gravitinos and axinos originating from spectral distortion, BBN and Lyman-alpha considerations. We analyze the current status and future prospects of such scenarios from cosmological probes. Furthermore, we provide the complementary constraints from collider data and assess the future discovery prospects.
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Nirmalya Brahma (McGill University)09/05/2023, 17:15Dark Matter
Dark photons can oscillate into SM photons via kinetic mixing in a way that is analogous to neutrino oscillations. Much like the MSW effect for neutrinos in environments of varying density, the probability for dark photons to convert to photons depends on the properties of the ambient background (density, electromagnetic fields, etc.) Resonances are even possible when there is a level-crossing...
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Daniel Aloni (Boston University, Harvard University)09/05/2023, 17:15
In this talk, I will motivate the study of models of dark radiation. Dark radiation models might have a rich phenomenology, with imprints on cosmological observables. Upcoming CMB and LSS measurements will be sensitive to different signals, which makes the exploration of Dark radiation imprints timely. Moreover, we recently showed that Dark radiation might be an asset in solving the Hubble and...
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Lucas Kang (Johns Hopkins University (US))09/05/2023, 17:15
We present simulation of the dominant off-shell Higgs production mechanisms (gluon fusion, vector boson fusion, and associated production with a vector boson) with subsequent decay to two Z bosons. Effects of Effective Field Theory (EFT) operators on kinematic distributions are modeled for the signal and interfering background diagrams.
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LINGFENG LI (Brown U.)09/05/2023, 17:15Axion and ALP
If a light axion is present during inflation and becomes part of dark matter afterwards, its quantum fluctuations contribute to dark matter isocurvature. In this article, we introduce a whole new suite of cosmological observables for axion isocurvature, which could help test the presence of axions, as well as its coupling to the inflaton and other heavy spectator fields during inflation such...
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Mr Matthew Knauss09/05/2023, 17:15BSM
In multi-Higgs models, a discrete symmetry in the quark sector is needed to avoid tree-level flavor-changing neutral currents. Although a similar symmetry is usually considered with the lepton sector, this symmetry is not necessary. We consider a multi-Higgs doublet model in which one Higgs doublet couples to quarks and three other doublets couple to the electron, muon and tau respectively....
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Evan Petrosky09/05/2023, 17:15BSM
The dark photon is a well-motivated and well-studied extension to the Standard Model. The strongest bounds on a dark photon with a mass near the Z pole come from precision electroweak analysis while for higher masses, collider bounds dominate. Existing tensions involving the heavy flavor observables, the W boson mass, and the muon magnetic moment motivate a revisiting of the precision...
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Manfred Paulini (Carnegie-Mellon University (US))09/05/2023, 17:15BSM
We summarize current results for searches of the production of supersymmtric particles decaying to photons in the final state using LHC data collected with the CMS detector. The latest results on a SUSY search with diphotons and large missing momentum as well as a stealth supersymmetry search involving diphotons and low missing momentum are presented.
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Minglei Xiao09/05/2023, 17:30BSM
The problem of enumerating a complete and independent set of operators for an effective field theory has been solved systematically by the Young Tensor method. In this talk, I am going to present the method adapted for Chiral Perturbation Theory, which introduces the Adler's zero condition to account for the nonlinearly realized symmetry associated with Goldstone bosons. Several subtleties are...
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Tom Bouley09/05/2023, 17:30BSM
In this talk I present recent work, deriving constraints on ultralight dark matter form Big Bang Nucleosynthesis. The work shows that the presence of ultralight dark matter can modify the effective values of fundamental constants during Big Bang Nucleosynthesis, affecting the predicted abundances of the primordial elements such as Helium-4. The dark matter evolution is influenced by...
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Terrance Figy (Wichita State University)09/05/2023, 17:30Higgs
In this presentation, I will explore the impact of finite top and bottom quark masses in the computation of scattering cross-sections for Higgs Boson production in association with three jets at Hadron Colliders like the CERN Large Hadron Collider. Additionally, I will offer insights into the expected outcomes for the production of a CP-violating Higgs.
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Wen Han Chiu09/05/2023, 17:30
We show how dark photons originating from an abelian Higgs model can be produced from the decay of the radial mode that acts as the curvaton, a light field during inflation that generates (part of) the adiabatic large scale cosmological primordial fluctuations.
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Deepak Sathyan09/05/2023, 17:30
We consider the effect of interactions between supernova neutrinos and dark matter. As these neutrinos travel towards Earth through a column density of dark matter, they could interact via dark mediator, deflecting after the process. Depending on the location of the supernova with respect to Earth, the attenuation of the neutrino flux from a local supernova could be observable by neutrino...
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Ms PUJA DAS (Student)09/05/2023, 17:30BSM
We investigate a pair production of doubly-charged scalars ($\Delta^{\pm \pm}$)
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at the High-Luminosity LHC in the recently proposed alternative U(1)$_X$ extension
of the Standard Model with the type-II seesaw mechanism. We focus on the $\Delta^{\pm \pm}$
production mediated by U(1)$_X$ gauge boson ($Z^\prime$) and find an enhancement of
the production cross section via $Z^\prime$ resonance... -
Lisa Benato (Hamburg University (DE))09/05/2023, 17:30BSM
Novel techniques, using trackless and delayed jet information combined in a deep neural network discriminator, can be employed to identify decays of long-lived particles. In this talk we present how such techniques could be exploited to search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters. The results, obtained using the full Run-II...
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Katherine Fraser (Harvard University)09/05/2023, 17:30Axion and ALP
In recent years, there has been renewed interest in the physics of axion strings since they naturally arise in axion models and can have a dramatic impact on cosmological observations. It is well- known that axion strings superconduct since massless chiral excitations can propagate along them. Aside from anomaly inflow, a common explanation for why these modes exist is that a bulk fermion...
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Mr Xucheng Gan (New York University)09/05/2023, 17:45
The portal connecting the invisible and visible sectors is one of the most natural explanations of the dark world. However, the early-time dark matter production via the portal faces extremely stringent late-time constraints. To solve such tension, we construct the scalar-controlled kinetic mixing varying with the ultralight CP-even scalar's cosmological evolution. To realize this and...
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Zhite Yu09/05/2023, 17:45BSM
Determining the $CP$ property of the Higgs boson is important for a precision test of the Standard Model as well as for the search for new physics. We propose a novel jet substructure observable based on the azimuthal anisotropy in a linearly polarized gluon jet that is produced in association with a Higgs boson at hadron colliders, and demonstrate that it provides a new $CP$-odd observable...
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Chiara Bissolotti (Argonne National Laboratory)09/05/2023, 17:45BSM
We study the potential of DIS measurements at the Large Hadron-electron Collider (LHeC) and the Electron-Ion Collider (EIC) to probe physics beyond the Standard Model. Our study is performed in the context of the Standard Model Effective Field Theory (SMEFT). We find that future measurements at both machines can improve existing SMEFT fits to precision electroweak data by resolving blind spots...
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Dr Sandra Robles (Fermilab)09/05/2023, 17:45
Upcoming neutrino experiments are expected to detect the Diffuse Supernova Neutrino Background (DSNB). This requires pondering all possible sources of background. Sub-GeV dark matter (DM) which annihilates into neutrinos is a potential background that has not been considered so far. We simulate DSNB and DM signals, as well as backgrounds in the Hyper-Kamiokande detector. We find that...
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Mr Anubhav Mathur (Johns Hopkins University)09/05/2023, 17:45BSM
Ultralight dark-photon dark matter coupled to the Standard Model (through e.g. $B$ or $B−L$ charges) would supply a new force that oscillates with a frequency set by the dark photon mass. Such forces result in fluctuations in the separation between inertial test masses, a physical quantity tracked in many gravitational-wave (GW) detectors. A recent GW detection proposal based on monitoring the...
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Jingyu Luo (Brown University (US))09/05/2023, 17:45BSM
Non-conventional signatures like exotic long-lived particles can naturally arise from many beyond-the-standard-model scenarios, which are closely connected to some of the most important puzzles in particle physics, including hierarchy problem, the nature of dark matter, the origin of neutrino mass, and the origin of matter-antimatter asymmetry. Searches for non-conventional signatures also...
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Hengameh Bagherian09/05/2023, 17:45Axion and ALP
The chromo-natural inflation (CNI) scenario predicts a potentially detectable chiral gravitational wave signal, generated by a Chern-Simons coupling between a rolling scalar axion field and an SU(2) gauge field with an isotropy-preserving classical background during inflation. However, the generation of this signal requires a very large integer Chern-Simons level, which can be challenging to...
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Rahool Kumar Barman (Oklahoma State University)09/05/2023, 17:45
We explore CP-violation in Higgs-top interactions via the semileptonic $pp \to t\bar{t}h$ channel with $h \to \gamma\gamma$ at the high luminosity LHC with machine learning-based unfolding techniques. We invert the event simulation chain, unfolding the detector-level events to construct and encode observables in their relevant partonic reference frame to improve CP sensitivity.
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Ms Wenzer Qin (MIT)09/05/2023, 18:00
With the prospect of detecting the cosmological 21 cm signal from the epoch of reionization just over the horizon, methods for extracting maximal cosmological information from this signal are increasingly timely. I will discuss recent work to further develop the effective field theory (EFT) for the 21 cm brightness temperature field during the epoch of reionization, incorporating renormalized...
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Yitian Sun (MIT)09/05/2023, 18:00BSM
The Galactic Center gamma-ray Excess (GCE) is a puzzling excess of gamma-ray photons in the inner galaxy, broadly consistent with annihilating dark matter signals, but can also be explained by unresolved astrophysical point sources (PSs) such as millisecond pulsars. Non-Poissonian Template Fitting (NPTF) has been used to study its origin; however, it has proven susceptible to systematic...
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Mr Ray Hagimoto (Rice U.)09/05/2023, 18:00
Axion-like particles (ALPs) can form a network of cosmic strings and domain walls that survives after recombination and leads to anisotropic birefringence of the cosmic microwave background (CMB). This effect provides a unique way of probing ALPs with masses in the range $3H_0 \lesssim m_a \lesssim 3H_{\rm cmb}$. In this talk I discuss the two-point statistics of birefringence from axion...
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Ben Carlson (Westmont College)09/05/2023, 18:00BSM
Searching for Higgs boson decays to four bottom quarks is a challenging and critical benchmark for LHC experiments. This final state is predicted by a variety of beyond the Standard Model theories, and current LHC searches focus on the associated production of a Higgs boson with a $W$ or $Z$ boson that subsequently decays to leptons which can be used for triggering. We evaluate the sensitivity...
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Chuyuan Liu (Carnegie-Mellon University (US))09/05/2023, 18:00
In this talk, we will discuss about the results of searches for Higgs pair production in the four-bottom-quark final state via gluon fusion (ggF), vector boson fusion (VBF) and the one associated with an additional vector boson (VHH) with the CMS detector. In addition to the analysis strategy and limits on the production cross section of this process, constraints on the Higgs boson...
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Kaan Simsek09/05/2023, 18:00BSM
The EIC's high luminosity, wide kinematic coverage, availability of proton and isoscalar deuteron targets, and ability to polarize both the lepton and hadron beams, allows for unique opportunities for precision tests of the electroweak sector of the Standard Model and constraining beyond the Standard Model physics in a manner that complements efforts at the LHC and low energy experiments. In...
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Tyler Horoho (University of Virginia)09/05/2023, 18:00Dark Matter
The constituents of dark matter are still unknown, and the viable possibilities span a very large mass range. Specific scenarios for the origin of dark matter sharpen the focus to within about an MeV to 100 TeV. Most of the stable constituents of known matter have masses in the lower range, and a thermal origin for dark matter works in a simple and predictive manner in this mass range as well....
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Mitchell Weikert (Rutgers University)09/05/2023, 18:15BSM
Well-motivated scenarios of thermally-produced dark matter often result in a population of electrons and positrons within galaxies produced through dark matter annihilation -- often in association with high-energy gamma rays. As they diffuse through galactic magnetic fields, these $e^\pm$ produce synchrotron radio emission. The intensity and morphology of this signal depends on the properties...
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Michael A. Fedderke (Johns Hopkins University)09/05/2023, 18:15Axion and ALP
I will present a novel search technique for axions with a CP-violating monopole coupling $\tilde{g}_{Q}$ to bulk SM charges $Q \in \{B,L,B-L\}$. Gradients in the static axion field configurations sourced by matter induce achromatic circular photon birefringence via the axion-photon coupling $g_{\phi \gamma}$. Circularly polarized light fed into an optical or (open) radio-frequency (RF)...
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Dr Yang Ma (INFN Bologna)09/05/2023, 18:15
We take multiple boson production at high-energy muon colliders to probe the Higgs-muon coupling in the Standard Model Effective Feild Theory (SMEFT) and Higgs Effective Feild Theory (HEFT) framework.
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Dr Jeffrey Hyde (Swarthmore College)09/05/2023, 18:15
Recently IceCube announced the observation of high-energy neutrinos from the active galaxy NGC 1068. Due to the potential for scattering between signal neutrinos and cosmic background neutrinos, this observation is sensitive to neutrino self-interactions mediated by a massive scalar. In this talk I will present bounds based on the data, highlight the role that detector physics plays in this...
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KAIRUI ZHANG (University of Wisconsin-Madison)09/05/2023, 18:15BSM
Under supersymmetry (SUSY) models with low electroweak naturalness (natSUSY), which have been suggested to be the most likely version of SUSY to emerge from the string landscape, we examine the viabilities of future search for the heavy SUSY Higgs bosons H, A, H^\pm through various their decay signatures in LHC. The traditional H, A -> tautau, as well as H^\pm -> tau+nu, t+b, with a spectator...
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Ritu Dcruz (Oklahoma State University)09/05/2023, 18:15BSM
We explore the possibility of resolving the $W$ mass shift observed by the CDF collaboration and the apparent deviation from unitarity in the first row of the CKM matrix simultaneously in a class of left-right symmetric models with universal seesaw. A unique non-trivial solution to the two anomalies was obtained, where the down quark mixing with vector-like quarks~(VLQ) resolves the CKM...
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Badal Bhalla (University of Oklahoma)09/05/2023, 18:15Axion and ALP
Stellar binaries have historically provided a rich target in the search for exotic compact objects such as primordial black holes (PBHs) or MACHOs. A sufficiently heavy compact object flying sufficiently close to a binary will disrupt or soften it, an effect that will show up in binary data as sparseness at large separation bins. While most studies have focused on the softening of wide...
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Prof. Wren Suess ((UCSC/ Stanford))10/05/2023, 08:45
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Prof. Carmen Carmona ((LZ, PSU))10/05/2023, 09:20
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Prof. Tien-Tien Yu (University of Oregon)10/05/2023, 09:55
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Prof. Clay Cordova ((U. of Chicago))10/05/2023, 11:00
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Prof. Ben Heidenreich ((UMass))10/05/2023, 11:35
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Joel Butler ((FNAL))10/05/2023, 12:10
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Mr Sean Heston (Center for Neutrino Physics, Department of Physics, Virginia Tech)Neutrinos
Neutrinos allow us to probe the interiors of stars during core collapse, and detecting them can teach us about the different stages and processes in the collapse. To date, only 24 supernova neutrinos have been detected all originating from a single event, SN1987A. Since then, most studies have focused on two different distance regimes of supernovae neutrinos: Galactic/local events and all past...
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