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Michael Ratz26/06/2023, 09:20
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Tim M.P. Tait (University of California, Irvine)26/06/2023, 09:25
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Prof. Manfred Lindner (Max-Planck-Institut fuer Kernphysik, Heidelberg, Germany)26/06/2023, 09:30
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Ernest Ma (University of California, Riverside)26/06/2023, 10:00
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Natsumi Nagata26/06/2023, 11:00
Weakly Interacting Massive Particles (WIMPs) in the Universe accumulate in neutron stars (NSs) through their interactions with ordinary matter and their annihilation inside the NS core causes late-time heating. It has been argued that this heating effect maintains the surface temperature of old NSs to be a few thousand K which can be regarded as a smoking gun signature of dark matter (DM)...
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Prof. Stuart Raby (The Ohio State University)26/06/2023, 11:30
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Yikun Wang (California Institute of Technology)26/06/2023, 12:00
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Saarik Kalia (University of Minnesota)26/06/2023, 14:20DM
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 ionosphere...
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Philipp Klose (Universität Bern)26/06/2023, 14:20Cosmology
We revisit the framework of axion-like inflation, considering a warm inflation scenario in which the inflaton couples to the topological charge density of non-Abelian gauge bosons whose self-interactions result in a rapidly thermalizing heat bath. Including both dispersive (mass) and absorptive (friction) effects, we find that the system remains in a weak regime of warm inflation (thermal...
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shaikh saad (University of Basel)26/06/2023, 14:20Particle
Motivated by the direct discovery of gravitational waves (GWs) from black holes and neutron stars, there is a growing interest in investigating GWs from other sources. Among them, GWs from cosmic strings are particularly fascinating since they naturally appear in a large class of grand unified theories (GUTs). Remarkably, a series of pulsar-timing arrays (PTAs) might have already observed GWs...
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Dr Takahiro Terada (Institute for Basic Science)26/06/2023, 14:40Cosmology
Inflationary models, especially those with plateau-type potentials, are consistent with the cosmological data, but inflation itself does not resolve the initial singularity. This singularity is resolved, for example, by the idea of the quantum creation of the Universe from nothing such as the tunneling and no-boundary proposals. The simplest one predicts a closed Universe. Motivated by these...
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Kevin Hinze26/06/2023, 14:40Particle
What is the minimal viable renormalizable $SU(5)$ GUT with representations no higher than adjoints? In this talk I discuss a $SU(5)$ model in which vectorlike fermions $5_F+\overline{5}_F$ as well as two copies of $15_H$ Higgs fields are introduced in order to accommodate for correct charged fermion and neutrino masses and to reproduce the matter-antimatter asymmetry of the universe. The...
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Jacques Pienaar (The University of Chicago)26/06/2023, 14:40DM
The current best limits on properties of potential particle physics candidates for dark matter are set by direct dark matter detectors using high purity liquid xenon. XENONnT, with 5.9 tonnes of instrumented liquid xenon, was commissioned in the middle of 2021, and completed its first science run in 2022. This talk will present the results of the first science run of XENONnT.
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Yitian Sun26/06/2023, 15:20DM
Axion dark matter produces echo images of bright radio sources due to stimulated decay. These echo images take the form of a faint radio line centered at half the axion mass with a width determined by the dark matter velocity dispersion. Due to the kinematics of the decay, the echo image can either be antipodal to the incoming source of stimulating radiation (gegenschein) or can be along the...
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The CUORE Collaboration26/06/2023, 15:20Particle
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for $0\nu\beta\beta$ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO$_2$ crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base...
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George Fanaras26/06/2023, 15:20Cosmology
In light of the recent swampland conjectures, we explore quantum cosmology and eternal inflation beyond the slow roll regime. We consider a model of a closed universe with a scalar field $\phi$ in the framework of tunneling approach to quantum cosmology. The scalar field potential is assumed to have a maximum at $\phi=0$ and can be approximated in its vicinity as $V(\phi)\approx...
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Prof. Lilia Anguelova (INRNE, Bulgarian Academy of Sciences)26/06/2023, 15:40Cosmology
We derive consistency conditions for sustained slow roll and rapid turn inflation in two-field cosmological models with oriented scalar field space, which imply that inflationary models with field-space trajectories of this type are non-generic. In particular, we show that third order adiabatic slow roll, together with large and slowly varying turn rate, requires the scalar potential of the...
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Prof. Fa Peng Huang (Sun Yat-sen University)26/06/2023, 15:40DM
We study the gravitational wave signals of ultralight axion dark matter around Kerr black hole by LISA in synergy with SKA.
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Janina Hakenmüller (Duke University)26/06/2023, 15:40Particle
In coherent elastic neutrino nucleus scattering (CE$\nu$NS), the neutrino interacts with the nucleus as a whole. This leads to a tiny recoil that can be registered with suitable detector technologies. The detection is highly challenging and requires a neutrino source within the coherent energy regime such as a nuclear power plant, a low enough energy threshold of the detectors and an excellent...
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Michael Turner (Chicago/UCLA)26/06/2023, 16:30
Big ideas and powerful instruments have allowed us to reconstruct the history of universe from its big-bang beginning 13.8 billion years ago through an early state of quantum fluctuations to a soup of quarks and other particles, from the formation of nuclei and atoms to the emergence of stars and galaxies, and finally to its accelerating expansion today driven by dark energy. I will share what...
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Julian Heeck27/06/2023, 09:00
Upcoming CMB stage-IV experiments have the potential to measure the effective number of relativistic degrees of freedom in the early Universe, Neff, with percent-level accuracy. Many Dirac-neutrino models that aim to address the Dirac stability, the smallness of neutrino masses or the matter-antimatter asymmetry of our universe endow the right-handed partners νR with additional interactions...
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Xiao-Gang He27/06/2023, 09:30
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Yael Shadmi27/06/2023, 10:00
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Graciela Beatriz Gelmini (University of California Los Angeles (US))27/06/2023, 11:00
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Daniel Chung (Unknown)27/06/2023, 11:30
Out of equilibrium axionic sector can generate blue isocurvature perturbations with a rich variety of spectra. Given that future galaxy surveys are probing shorter length scales with a greater accuracy, blue isocurvature perturbations are natural targets for these surveys. After a brief overview of blue axionic perturbations, a Fisher forecast for the Euclid and MegaMapper experiments in...
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Dr Delilah Gates (Princeton)27/06/2023, 12:00
As a black hole tends towards maximal spin the near-horizon region develops a throat-like geometry of divergent proper volume. The development of this throat has consequences on observable phenomena. Herein we will examine two such examples. First we consider adiabatic growth of a black hole within a cloud of particles. For a high-spin black hole this process results in a finite nonzero...
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Marianne Moore27/06/2023, 14:20Particle
The sexaquark, a hypothesized six-quark bound state, has garnered interest as a potential dark matter candidate. At the same time, there are many arguments in the literature that place severe limitations on this possibility. Assuming it exists and is stable, I will advance a compelling case for the limited viability of the sexaquark as a dark matter candidate by presenting the first...
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Lu Yin (APCTP)27/06/2023, 14:20Cosmology
Exciting clues to isotropic cosmic birefringence have recently been detected in the $EB$ cross-power spectra of the polarization data of the cosmic microwave background (CMB). Early Dark Energy (EDE) models with a pseudoscalar field coupled to photons via a Chern-Simons term can be used to explain this phenomenon, and can also potentially be used to simultaneously resolve the $H_0$ tension. In...
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Omar Medina (IFIC (CSIC-Universitat de València))27/06/2023, 14:20Particle
We present a model that explains the origin of the neutrino mass ordering through the spontaneous breaking of a discrete flavor symmetry. Our model addresses the hierarchy between neutrino masses by combining the seesaw and scotogenic mechanisms, both emerging naturally from an $A_4$ discrete symmetry broken at the electroweak scale. The model incorporates a scalar dark matter particle...
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Marcell Howard27/06/2023, 14:40Cosmology
Stochastic gravitational wave backgrounds (SGWBs) are the conglomeration of unresolved gravitational wave signals from the early universe and from astrophysical sources, which make them a promising tool for cosmologists. Because gravitons decouple from the cosmic plasma early on, one can consider interactions between gravitons and any particle species that were present in the very early...
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Prof. Hsiang-nan Li (Academia Sinica)27/06/2023, 14:40Particle
We demonstrate that the Higgs boson mass can be extracted from the dispersion relation obeyed by the correlation function of two b-quark scalar currents. The solution to the dispersion relation with the input from the perturbative evaluation of the correlation function up to next-to-leading order in QCD and with the $b$ quark mass $m_b=4.43$ GeV demands a specific Higgs mass $115^{+13}_{-9}$...
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Orion Ning27/06/2023, 14:40DM
The Hitomi X-ray satellite mission carried unique high-resolution spectrometers that were set to revolutionize the search for sterile neutrino dark matter (DM) by looking for narrow X-ray lines arising from DM decays. Unfortunately, the satellite was lost shortly after launch, and to-date the only analysis using Hitomi for DM decay during its brief, one-month long live time was for data taken...
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108. Affleck-Dine leptogenesis with one loop neutrino masses and a solution to the strong CP problemNobuchika Okada27/06/2023, 15:00Cosmology
We discuss a unified model that solves four major problems of the standard model i.e. neutrino masses the origin of matter the strong CP problem and dark matter by using the framework of the Affleck-Dine (AD) mechanism. The AD field is responsible for inflation the origin of matter and neutrino masses which arise at the one-loop level. Neutrino masses are therefore intimately...
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Xiaobin Lu27/06/2023, 15:00Particle
PROSPECT, the Precision Reactor Oscillation and SPECTrum Experiment, is a short-baseline reactor-based neutrino experiment aiming to make a precision measurement of reactor antineutrino energy spectra and model-independently search for eV-scale sterile neutrinos. The experiment collected over 50,000 neutrino interactions over the course of five reactor-on cycles at the High Flux Isotope...
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Satoshi Shirai (Kavli IPMU)27/06/2023, 15:00DM
An electroweak-charged dark matter Model a well-motivated dark matter candidate. The Wino, Higgsino and 5plet fermions are typical examples.
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In these models, the charged partner becomes metastable.
Disappearing charged tracks and soft objects produced by the charged partner are important for the test of this model in collider experiments.
The signals strongly depend on the lifetime and... -
Mehrdad Phoroutan-Mehr (University of California, Riverside (UCR))27/06/2023, 15:40Formal/strings
The existence of supermassive black holes at the center of galaxies redistributes the dark matter density profile in the region of influence and creates a higher density region so-called density spike. In the self-interaction dark matter scenario, the velocity dispersion in the spike region scales with a power law of r^−1/2, and the density spike scales with a power law of r^−(3+a)/4, where...
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GEORGE WOJCIK27/06/2023, 15:40Particle
In this talk I discuss recent work on model building for the anomalous muon magnetic moment with ``portal matter'' vector-like fermions charged under both SM hypercharge and a hidden Abelian gauge group U(1)D which can induce kinetic mixing at one loop. The portal matter fields are a well-motivated extension of simplified dark matter models in which the dark matter candidate interacts with...
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So Chigusa27/06/2023, 15:40DM
Axions and dark photons are well-motivated dark matter candidates but much of their parameter space remains unexplored. We demonstrate that magnetometry with nitrogen-vacancy centers can cover a broad parameter space with masses over several orders of magnitude. Its unique advantages include a wide dynamic range and the ability to perform measurements without magnetic shielding enhancing its...
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Marco Palmiotto (Institut de physique des deux infinis Lyon, Université Claude Bernard Lyon 1)27/06/2023, 16:00DM
Go to contribution pageDarkPACKis a software that automatically generates a numerical library
of scattering amplitudes from the Lagrangian density of the model, to
compute dark matter observables such as relic density. It relies on
MARTYandSuperIso relicand is written inC++. In the current
version,DarkPACKcan easily generate all the squared
amplitudes of 2 NP particles into 2 Standard Model... -
Teerthal Patel (Arizona State University)27/06/2023, 16:00Formal/strings
The “electroweak dumbbell” consists of a magnetic monopole and an antimonopole of the standard electroweak model connected by a string made of Z-magnetic field. The dumbbells formed during the epoch of electroweak symmetry breaking in the early Universe undergo annihilation, and leave behind cosmological relic magnetic fields. Electroweak dumbbells may also be produced in scattering...
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Sergio Sevillano27/06/2023, 16:00Particle
The ability to represent perturbative expansions of interacting quantum field theories in terms of simple diagrammatic rules has revolutionized calculations in particle physics. However in the case of extended theories of gravity deriving this set of rules requires linearization of gravity perturbation of the scalar fields and multiple field redefinitions making this process very...
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Yo Toda27/06/2023, 16:20DM
We investigate the model where electrons and dark matter interact with dark energy through the rolling of a scalar field which comes from extra dimensional theories such as the braneworld theory and Brans-Dicke theory. In this model dark energy couples to dark matter and electrons which leads to larger values of the mass energies of dark matter and electrons in the early universe. We also...
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YI LIU (university of Southampton)27/06/2023, 16:20Particle
We study the possibility of measuring neutrino Yukawa couplings in the Next-to-Minimal Supersymmetric Standard Model with right-handed neutrinos (NMSSMr) when the lightest right-handed sneutrino is the Dark Matter (DM) candidate by exploiting a `dijet + dilepton + Missing Transverse Energy' (MET or $\slashed{E}_T$) signature. We show that this extended model of SUSY offers a much lighter...
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Juan Carlos Vasquez (Amherst College)27/06/2023, 16:20Formal/strings
Under certain assumptions and independent of the instantons, we show that the
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logarithm expansion of dimensional regularization in quantum field theory needs a
nonperturbative completion to have a renormalization-group flow valid at all ener-
gies. Then, we show that such nonperturbative completion has the analytic proper-
ties of the renormalons, which we find with no reference to... -
Jacob Spisak (University of California, San Diego)27/06/2023, 16:40DM
Very light pseudoscalar fields, often referred to as axions, are compelling dark matter candidates and can potentially be detected through their coupling to the electromagnetic field. Recently a novel detection technique using the cosmic microwave background (CMB) was proposed, which relies on the fact that the axion field oscillates at a frequency equal to its mass in appropriate units,...
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Dr Supriya Senapati (University of Massachusetts Amherst)27/06/2023, 16:40Particle
Left-Right (LR) theories are one of the successful beyond Standard Model (SM) frameworks that explain the origin of small neutrino masses and low-energy weak parity violation. However, the conventional LR theory faces a challenge due to the presence of flavor changing neutral currents (FCNCs). To address this, we have studied an Alternative LR model (ALRM), which avoids FCNC constraints. Our...
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Tatsuya Daniel (Brown University)27/06/2023, 16:40
I will discuss ongoing work in studying how the combination of two modified gravity theories that are well motivated from string theory, Dynamical Chern-Simons (dCS) and Einstein-dilaton-Gauss-Bonnet (EdGB) gravity, will affect the gravitational waveforms emitted from a binary neutron star system, as well as observed neutron star relations such as the mass-radius relation and universal...
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Keith Dienes28/06/2023, 09:00
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Susha Louise Parameswaran (University of Liverpool)28/06/2023, 09:30
It has proven surprising difficult to obtain a microscopic understanding of Dark Energy within string theory. The two main paradigms, a landscape of de Sitter vacua or slow-roll quintessence, seem to require working at the boundaries of control, which has led to much fruitful debate. I will discuss alternative scenarios for Dark Energy within string theory, in which interacting Dark Sectors...
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Fernando Quevedo28/06/2023, 10:00
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Christopher Verhaaren (Brigham Young University)28/06/2023, 11:00Formal/strings
The gauge bosons of a hidden U(1) sector seems to be one of the simplest extensions of the standard model. However, if this hidden sector includes magnetic charges a host of novel phenomena result. These include new dark matter possibilities with distinctly new way to detect them. I give an overview of some of the phenomena and theoretical understanding that hidden magnetic monopoles provide.
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Dr Ofri Telem (UC Berkeley)28/06/2023, 11:30
Magnetic monopoles and dyons are unique beasts in the zoo of Quantum Field Theory. The long range interaction between monopoles and electric charges generates an extra electromagnetic angular momentum, fundamentally changing the S-matrix for their scattering.
Though the effective field theory of Dirac monopoles and charges has been known since the ‘70, its Hilbert space has only been...
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Dr Daniel Harlow (MIT)28/06/2023, 12:00
In the last decade our understanding of holography has reached the point where a resolution of Hawking's black hole information problem seems to be in reach. In this talk I'll give a high-level overview of where we are now.
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Daniel Stolarski (Carleton University)28/06/2023, 14:20DM
I will describe a unified mechanism for generating a baryon and dark matter asymmetry in models with multiple hidden sectors that are Standard Model-like but with varying Higgs mass parameters. These models have a unique cosmology with the different sectors reheated asymmetrically to relatively low temperature. A hidden sector with positive Higgs mass squared can accommodate dark matter with...
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Zach Bogorad28/06/2023, 14:20Particle
I will present a new constraint on long-range interactions between dark matter and the Standard Model, based on the effects of dynamical friction in ultrafaint dwarf galaxies (UFDs). Parsec-scale interactions between dark matter and the Standard Model are currently poorly constrained. However, such long-range forces can lead to a gradual transfer of kinetic energy from stars to the dark matter...
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Yoshiki Kanazawa (University of Tokyo)28/06/2023, 14:20Formal/strings
It is expected that any global symmetry is explicitly violated by gravity. In QCD axion models the effective axion potential obtains other terms than QCD contributions due to gravitational violation of the global U(1) Peccei-Quinn (PQ) symmetry and the minimum of the potential is deviated from the CP-conserving points. In general the deviation is large enough to invalidate the PQ solution...
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Yohei Ema28/06/2023, 14:40Particle
There are many New Physics scenarios that may affect the current discrepancy between the measurement and the prediction of the muon anomalous magnetic moment. One such possibility is a long-range force created by ordinary atoms acting on the muon spin. If the muon $g-2$ discrepancy is attributed to such a force, it would imply a tiny, $\mathcal{O}(10^{-13})\,\mathrm{eV}$ spin energy splitting...
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Yahya Almumin28/06/2023, 14:40Formal/strings
Complex scalars in U(1)-symmetric potentials can form stable Q-balls, non-topological solitons that correspond to spherical bound-state solutions. If the U(1) charge of the Q-ball is large enough, it can support a tower of unstable radial excitations with increasing energy. Previous analyses of these radial excitations were confined to fixed parameters, leading to excited states with different...
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Hao Chen28/06/2023, 14:40DM
LUX-ZEPLIN (LZ) is located at Sanford Underground Research Facility (SURF) in Lead, South Dakota. It uses a dual-phase xenon time projection chamber to search for Weakly Interacting Massive Particles (WIMP) and other new physics beyond the Standard Model. LZ completed its first science run in 2022. With its low background and large mass (7 tonne) of liquid xenon, LZ has set the most stringent...
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Xucheng Gan28/06/2023, 15:00Particle
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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Alex Stewart28/06/2023, 15:00Formal/strings
Cachazo, He, and Yuan (CHY) demonstrated an alternative approach for computing the tree-level S-matrix of pure Yang-Mills theories in arbitrary spacetime dimensions on shell, as a contour integral encircling solutions of the so-called "scattering equations" in their paper "Scattering of Massless Particles in Arbitrary Dimensions." Later, Dolan and Goddard analyzed the scattering equations and...
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Brian Shuve (Harvey Mudd College)28/06/2023, 15:00DM
Many scenarios of physics beyond the Standard Model predict new
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particles with masses well below the electroweak scale. Low-energy, high
luminosity colliders such as BABAR are ideally suited to discover these
particles. We present several recent searches for low-mass dark sector
particles at BABAR, self-interacting dark matter, axion like particles,
and dark sector particles produced in B... -
Brooks Thomas28/06/2023, 15:40Particle
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 PBH...
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Claudio Savarese (Princeton University)28/06/2023, 15:40DM
Among the numerous technologies developed in the field of Dark Matter direct detection, noble element dual-phase time projection chambers (TPC) have proved to be an outstanding solution, scalable to extremely high target masses without dramatic increases in read-out complexity. The DarkSide programme pioneered the use of liquid argon as a DM scattering target in such detectors and is now...
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Helena Garcia Escudero (UCI)28/06/2023, 15:40Cosmology
We explore possible mechanisms of suppressing the production of keV scale sterile neutrinos, which is the target parameter space of several current/upcoming laboratory experiments such as KATRIN, HUNTER or MAGNETO-nu. These alternative scenarios include universes with a nontrivial cosmic lepton number, new neutrino interactions with light bosons, late-time neutrino mass generation, low...
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Jeffrey Kuntz (Max-Planck-Institute for Nuclear Physics)28/06/2023, 16:00Cosmology
It is well-known that renormalizable theories of quadratic gravity pose a risk to unitarity of the S-matrix due to the spin-2 ghost degrees of freedom that they inevitably propagate. However, in recent years, a few promising methods to guarantee unitarity in the presence of these ghosts have been proposed. In light of these recent developments, we consider a generic model of quadratic gravity...
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Dr Subhajit Ghosh (University of Notre Dame)28/06/2023, 16:00DM
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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Dr Fazlollah Hajkarim (University of Oklahoma)28/06/2023, 16:00Particle
The impact of axion-like particles on the light polarization around the horizon of supermassive black hole (SMBH) is discussed in the light of the latest polarization measurement of the Event Horizon Telescope (EHT). We investigate different sources of the polarization due to axion interaction with photons and the magnetic field of SMBH. These can modify the linear and circular polarization...
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Daneng Yang28/06/2023, 16:20DM
We propose a parametric model for studying self-interacting dark matter (SIDM) halos. The model uses an analytical density profile, calibrated using a controlled N-body SIDM simulation that covers the entire gravothermal evolution, including core-forming and -collapsing phases. By normalizing the calibrated density profile, we obtain a universal description for SIDM halos at any evolution...
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Dr Keisuke Inomata (University of Chicago, KICP)28/06/2023, 16:20DM
Rotations of axion fields in the early universe can produce dark matter and matter-antimatter asymmetry of the universe.
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In a class of models, the equation of state of the rotations rapidly changes from a non-relativistic matter-like one to a kination-like one.
We point out that the rapid change can produce an observable amount of gravitational waves through the Poltergeist mechanism. -
Matthew Sullivan (Brookhaven National Laboratory)28/06/2023, 16:20Particle
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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Tyler Smith (University of California, Irvine)28/06/2023, 16:40
In the ever-expanding landscape of BSM model building, the ubiquitous presence of new vector bosons has led to new frontiers in probing the depths of fundamental physics. While it is widely acknowledged that non-conserved currents of these vector bosons can lead to (energy/vector mass)^2 enhancements, we diverge from standard literature and consider the realm of conserved currents. We...
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Michael A. Fedderke (Johns Hopkins University)28/06/2023, 16:40DM
In this talk, I will present a novel technique to search 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)...
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Huangyu Xiao (Fermilab)28/06/2023, 16:40Cosmology
Axion-like dark matter whose symmetry breaking occurs after the end of inflation predicts enhanced primordial density fluctuations at small scales. This leads to dense axion minihalos (or miniclusters) forming early in the history of the Universe.
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Condensation of axions in the minihalos leads to the formation and subsequent growth of axion stars at the cores of these halos. If, like the... -
Dr Chanda Prescod-Weinstein (University of New Hampshire)29/06/2023, 09:00
In this talk, I will motivate why in the 2020s so many of us are focusing on astrophysics and cosmology as an important tool for studying one of the most challenging questions in all of particle physics: determining what exactly dark matter is comprised of. I will focus most especially on questions relating to large-scale structure an axion-like particle models, as well as on asymmetric dark...
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Ryuichiro Kitano29/06/2023, 09:30
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Ferruccio Feruglio29/06/2023, 10:00
Solutions of the strong CP problem based on modular invariance are discussed in several frameworks.
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Hans Peter Nilles (Institut fuer Theoretische Physik)29/06/2023, 11:00
Modular transformations of string theory are shown to play a crucial role in the discussion of discrete flavor symmetries in the Standard Model. They include CP transformations and provide a unification of CP with traditional flavor symmetries within the framework of the eclectic flavor scheme. The unified flavor group is non-universal in moduli space and exhibits the phenomenon of "Local...
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Saul Ramos-Sanchez (UNAM, Mexico)29/06/2023, 11:30
Semi-realistic string models offer a plausible path to uncover the flavor structure of particle physics, which improves over models based on pure traditional or pure modular flavor symmetries. Interestingly, the eclectic flavor picture they exhibit, leads to realistic patterns of fermion masses and mixings, which depend on a modulus and matter-field configuration. Further, string models...
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Lisa Everett29/06/2023, 12:00
We discuss recent model-building directions within the general kinetic mixing/vector portal dark matter paradigm in which the portal matter is embedded together with the second and third generation Standard Model leptons in irreducible representations of a non-Abelian dark sector gauge group.
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Dr Andrey Shkerin (University of Minnesota)29/06/2023, 14:20DM
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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Prof. Evgueni Goudzovski (University of Birmingham)29/06/2023, 14:20Particle
Rare kaon decays are among the most sensitive probes of both heavy and light new physics beyond the Standard Model description thanks to high precision of the Standard Model predictions, availability of very large datasets, and the relatively simple decay topologies. The NA62 experiment at CERN has reported the first observation of the ultra-rare $K^+\to\pi^+\nu\bar\nu$ decay, and is...
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Eleanor Hall29/06/2023, 14:20Formal/strings
Abstract: Gravitational waves from cosmological phase transitions offer the chance to probe the very first second of the universe’s history and are one of our most promising signal channels of BSM physics. With space-based detectors such as LISA on the horizon, we urgently need reliable tools for predicting GW signals in strongly-coupled theories. In this talk, I discuss our recent proposal...
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Andrzej Hryczuk29/06/2023, 14:40DM
In this talk I will discuss some of the recent progress in understanding the impact of non-equilibrium effects on dark matter (DM) production. First I will present a framework for performing calculations beyond kinetic equilibrium and exemplify its importance on several classes of DM models. Then I will discuss the latest results regarding impact of processes distorting the momentum...
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Chen-Te Ma29/06/2023, 14:40Formal/strings
The gauge formulation of Einstein gravity in AdS$_3$ background leads to a boundary theory that breaks modular symmetry and loses the covariant form. We examine the Weyl anomaly for the cylinder and torus manifolds. The divergent term is the same as the Liouville theory when transforming from the cylinder to the sphere. The general Weyl transformation on the torus also reproduces the Liouville...
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Julian Bollig (Albert-Ludwigs-Universität Freiburg)29/06/2023, 14:40DM
Indirect detection is one of the most powerful methods to search for annihilating dark matter (DM) covering a broad range of masses and interactions. Recently, non-perturbative effects have been shown to significantly alter model observables. In this work, we investigate the impact of non-perturbative effects in the indirect detection of DM. For this purpose we utilize a minimal model...
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Dr Savan Kharel29/06/2023, 15:20Formal/strings
I will focus on the computation of graviton function in (Anti)-de Sitter space, specifically concentrating on gravitons with all positive external helicity. To tackle this problem, I will introduce a generalized recursion method inspired by the BCFW (Britto-Cachazo-Feng-Witten) technique. This method involves a deforming of the external momentum of the graviton function by complexifying it and...
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Dr Javier Acevedo (SLAC)29/06/2023, 15:20DM
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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Dr Xiang-Gan Liu (University of California - Irvine)29/06/2023, 15:20Formal/strings
The Kahler potentials of modular symmetry models receive unsuppressed contributions which may be controlled by a flavor symmetry, where the combination of the two symmetry types is referred to as eclectic flavor symmetry. After briefly reviewing the consistency conditions of eclectic flavor symmetry models, including those with generalised (g)CP, we perform a comprehensive bottom-up study of...
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Sarunas Verner (University of Florida)29/06/2023, 15:40DM
In this presentation, I discuss the production of a spectator scalar dark matter field that directly couples to the inflaton. Conventional scenarios of purely gravitationally produced dark matter with masses below the Hubble parameter at the end of inflation are in tension with Cosmic Microwave Background (CMB) constraints on the isocurvature power spectrum. We explore a more general scenario...
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Max Fieg29/06/2023, 15:40Particle
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 previous... -
Victor Knapp Perez (UCI)29/06/2023, 15:40Formal/strings
Modular flavor symmetries have gained significant attention as a promising method for predicting lepton mixing parameters. However, in a bottom-up approach, the lack of precise control over the parameters in the kinetic terms limits their predictability . To address this, we propose deriving the Yukawa couplings from an underlying geometry, specifically magnetized tori.
In this talk, we...
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Fernando Quevedo29/06/2023, 16:30
Talent in science is uniformly distributed among regions, nationalities,
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gender, race and social origin. However, opportunities are not. An
overview is presented of the challenges we are facing to reach a balance
regarding access to scientific education and for developing a scientific
career for underrepresented sectors of the society, either locally
within a given country or... -
Ryan Keeley (UC Merced)30/06/2023, 09:00
What has everyone so excited about the H0 tension is the potential for discovering new physics. In particular, the question of new physics explanations for this tension are often divided into whether the new physics plays a role at high redshift or low redshift. In this talk, I will make the case that there can be no low-redshift solution to the H0 tension. To robustly answer this question, I...
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PQ Hung30/06/2023, 09:30
A unified dynamical model of dark energy and inflation is presented, in which both phenomena are driven by axion-like fields-quintessences-of spontaneously broken global U(1)’s symmetries whose potentials are induced by instantons of the QCD gauge group SU(3)c for inflation and of a new strongly interacting gauge group SU(2)Z for dark energy. It is shown that SU(3)c and SU(2)Z fit snugly into...
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Prof. Kimberly Boddy (University of Texas at Austin)30/06/2023, 10:00
Pulsar timing array experiments aim to detect nHz-frequency gravitational waves using high-precision timing of millisecond pulsars. Of particular interest is a stochastic gravitational wave background (SGWB), which is expected to arise predominantly from a population of inspiraling supermassive black hole binaries, but there may also be contributions from exotic cosmological sources, such as...
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Sebastian Trojanowski30/06/2023, 11:00
The ongoing LHC Run 3 has initiated a novel BSM and neutrino physics program at the LHC in its far-forward region. While dedicated detectors FASER and SND@LHC are already taking data this could be further significantly extended during the HL-LHC era with the proposed Forward Physics Facility (FPF). In the talk I will summarize the physics opportunities of this new research direction with an...
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Dave Casper (University of California Irvine (US))30/06/2023, 11:30
FASER, the ForwArd Search ExpeRiment, is an LHC experiment located 480 m downstream of the ATLAS interaction point, along the beam collision axis. FASER and its sub-detector FASERnu have two physics goals: (1) to search for new light and very weakly-interacting particles, and (2) to detect and study TeV-energy neutrinos, the most energetic neutrinos ever detected from a human-made source....
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Shufang Su (University of Arizona)30/06/2023, 12:00
FASER, the ForwArd Search ExpeRiment, is a currently operating experiment at the Large Hadron Collider (LHC) that can detect light long-lived particles produced in the forward region of the LHC interacting point. In this paper, we study the prospect of detecting light CP-even and CP-odd scalars at FASER and FASER 2. Considering a model-independent framework describing the most general...
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PQ Hung30/06/2023, 12:30
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Dr Nicholas DePorzio (Harvard University)Cosmology
Ultra-light axions with masses $10^{-33} < m_\phi/{\rm eV} < 10^{-22}$ are allowed to constitute only a small fraction of the observed dark matter abundance. Nevertheless, they may yet produce a visible impact on the cosmology due to their macroscopic quantum scale. Next generation galaxy survey data are poised to challenge this possibility, but in order to do so, all aspects of structure...
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Dr Swagat Saurav Mishra (University of Nottingham, UK)
Primordial Black Holes (PBHs) may form in the early universe, from the gravitational collapse of large density perturbations, generated by large quantum fluctuations during inflation. Since PBHs form from rare over-densities, their abundance is sensitive to the tail of the primordial probability distribution function (PDF) of the perturbations. It is therefore important to calculate the full...
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Lukas Graf (University of California, Berkeley)
Restoration of left-right symmetry at high energy scales provides a well-motivated extension of the Standard Model, which has been scrutinized over the past few decades and that can be viewed as the intermediate step towards grand unification. In my talk, I will investigate whether these models can be probed via the search for a stochastic gravitational wave background induced by the...
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Joshua Benabou (University of California, Berkeley / Lawrence Berkeley National Lab)
If the PQ symmetry is broken after inflation then the QCD axion mass that gives rise to the observed dark matter (DM) abundance can in principle be calculated precisely. In practice it remains a computational challenge to accurately predict the DM contribution from nonlinear features of the PQ field such as axion strings, which introduce a large hierarchy of scales between their width and the...
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Ignacio A. Reyes (University of Amsterdam)
Very compact stars seem to be forbidden in General Relativity. While Buchdahl's theorem sets an upper bound on compactness, further no-go results rely on the existence of two light rings, the inner of which is associated to gravitational instabilities. However, little is known about the role of QFT in these strong gravity regimes. We show that the renormalized stress tensor for CFTs diverges...
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Alec HewittParticle
Heavy Neutral Leptons (HNLs) are among the leading examples of long-lived particles. For masses in the MeV to GeV range, HNLs are light enough to be produced at many collider and accelerator facilities, but also heavy enough to decay to visible particles on length scales that can be observed in particle detectors. We discuss the FORESEE simulation package to include the production and decay...
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