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Dr Bradley Kavanagh08/08/2022, 09:00Plenary Talk
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Prof. Katelin Schutz08/08/2022, 09:30Plenary Talk
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Dr Eiji Kido (RIKEN Cluster for Pioneering Research)08/08/2022, 10:30Plenary Talk
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Petra Huentemeyer08/08/2022, 11:00Plenary Talk
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Dr Fred Sarazin (Colorado School of Mines)08/08/2022, 11:30Plenary Talk
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Ms Wenzer Qin (MIT)08/08/2022, 14:00
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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Dr Jung-Tsung Li (Ohio State University)08/08/2022, 14:00
We investigate the effect of inertial range magnetohydrodynamic turbulence to the 1-dimensional force-field model. Using well established quasilinear theory together with the recently available magnetic power spectrum from Parker Solar Probe, we perform calculations of parallel diffusion coefficient, modulation potential and galactic cosmic ray flux in the inner heliosphere. The model applies...
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Robert B.08/08/2022, 14:00
Supernova remnants are known to accelerate cosmic rays from the detection of non-thermal emission of radio waves, X-rays, and gamma rays. The presence of cut-offs in the gamma-ray spectra of several young SNRs led to the idea that the highest energies might only be achieved during the very initial stages of a remnant’s evolution. Unfortunately, the gamma-ray luminosity is assumed to peak in...
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David Curtin (University of Toronto)08/08/2022, 14:00
Complex Dark Sectors are theories of hidden particles and forces that could constitute all or part of dark matter but have non-minimal interactions between them, such as dark analogues of electromagnetism of the strong force. These scenarios are predicted by many highly motivated extensions of the Standard Model that solve fundamental mysteries like the hierarchy problem, but are notoriously...
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Cristina Lagunas Gualda08/08/2022, 14:00
The IceCube Neutrino Observatory is the world largest neutrino telescope, instrumenting one cubic kilometer of Antarctic ice. IceCube started its operation in 2011 and a diffuse flux of neutrinos was discovered in 2013. To this day the sources of those neutrinos are still largely unknown. One of the most promising source candidates are blazars, Active Galactic Nuclei with jets aligned towards...
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Mr Javier Acevedo (Queen's University)08/08/2022, 14:20
An intriguing possibility for dark matter is that it formed bound states in the early Universe, in a scenario called 'composite' dark matter, much like the Standard Model fundamental particles formed nucleons, nuclei and atoms. One of the simplest composite dark matter models consists of dark fermions bound together by a real scalar field. Composite states that are massive enough source scalar...
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Kylar Greene (University of New Mexico)08/08/2022, 14:20
The Hubble-Lemaitre tension is currently one of the most important questions in cosmology. Most of the focus so far has been on reconciling the Hubble constant value inferred from detailed cosmic microwave background measurement with that from the local distance ladder. This emphasis on one number -- namely H0 -- misses the fact that the tension fundamentally arises from disagreements of...
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Yi Jia (Massachusetts Inst. of Technology (US))08/08/2022, 14:20
The detailed measurement of the daily electron, positron, proton, and helium fluxes based on 10 year data from May 20, 2011 to May 2, 2021 with the Alpha Magnetic Spectrometer on the International Space Station, is presented.
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Jannis David Necker (DESY)08/08/2022, 14:20
The collected data of IceCube, a cubic kilometre neutrino detector array in the antarctic ice, reveal a diffuse flux of astrophysical neutrinos. The sources of these neutrinos however have yet to be discovered. Recently, high-energy neutrino alerts, sent out by IceCube in real time, were observed in coincidence with two (likely) Tidal Disruption Events (TDEs). A follow-up study found a...
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Sajan Kumar (University of Maryland, College Park)08/08/2022, 14:20
The origin of the cosmic rays (CRs) is a complex problem that requires a proper understanding of the CR's acceleration, diffusion, and radiation mechanisms. However, observations suggest that these properties of CRs depend highly on the initial supernova explosion conditions and the structure of the ambient material into which a supernova remnant (SNR) expands. Therefore, a source-by-source...
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Anastasia Sokolenko08/08/2022, 14:40Cosmology
Most of the volume of the Universe consists of the Intergalactic Medium (IGM), space between collapsed structures like galaxies and galaxy clusters. Extragalactic photons and charged particles that propagate through the Universe spend most of their time in the IGM and can be influenced by its properties. In this talk, I will present a few examples of how we can study fundamental physics from...
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Federico Donnini (Universita e INFN, Perugia (IT))08/08/2022, 14:40
Cosmic Rays (CR) inside the Heliosphere interact with the solar wind and with the interplanetary magnetic field, resulting in a temporal variation of the cosmic ray intensity near Earth for rigidities up to few tens of GV. This variation is known as Solar Modulation. Previous AMS results on proton and helium spectra showed how the two fluxes behave differently in time. To better understand...
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Avi Friedlander (Queen's University)08/08/2022, 14:40
The addition of spatial dimensions compactified to submillimeter scales serves as an elegant solution to the hierarchy problem. As a consequence of such large extra dimensions, is the possibility of producing primordial black holes (PBHs) from high-energy collisions in the early universe, leading to a novel source of dark matter. While four-dimensional PBHs have been extensively studied, they...
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Robert B.08/08/2022, 14:40
Supernova remnants (SNRs) are known to accelerate particles to relativistic energies, from the detection of nonthermal emission. The particularities of the acceleration mechanism are still debated. Here, we discuss how particle escape modifies the observable spectra as well as morphological features that might be revealed by the observational progress from radio to gamma-ray energies.
We...
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Soebur Razzaque08/08/2022, 14:40
Blazars are potential candidates of cosmic-ray acceleration up to ultrahigh energies (> 1 EeV). For an efficient cosmic-ray injection from blazars, 𝑝𝛾 collisions with the extragalactic background light and cosmic microwave background can produce gamma-ray and neutrino fluxes in the TeV and PeV-EeV energies, respectively. Such a line-of-sight cosmogenic gamma-ray flux can contribute to the...
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J. Leo Kim (Queen's University)08/08/2022, 15:00
We present a novel statistical framework to infer cosmological parameters from cosmological surveys, based on a Bayesian forward modelling of correlated Poisson processes. In particular, given catalogs of galaxies and standard sirens, we compute the posterior distributions for cosmological parameters by assuming that the detection of standard sirens follow a spatial Poisson process that...
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Olivier Tourmente08/08/2022, 15:00
More than a decade after their discovery, the mechanism behind the Fermi bubbles features is still elusive. The two main models considered for the advection of cosmic-rays (CRs) are a jet model for leptonic process or wind model for hadronic process. An alternative has been proposed where CRs, produced by pp collisions, are both diffused and advected by a Galactic breeze, ie a subsonic...
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191. Propagation of Cosmic Rays in Plasmoids of AGN Jets-Implications for Multimessenger PredictionsIlja Jaroschewski (Ruhr-University Bochum)08/08/2022, 15:00
With the successful detection of cosmic high-energy neutrinos and the first high-probability association of such a neutrino to the blazar TXS 0506+056 leads to the anticipation that active galactic nuclei could soon be identified as point source emitters of high-energy neutrinos. This opens up new challenges for a joint explanation of the observed electromagnetic spectrum together with...
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Dr Nicholas Orlofsky (Carleton University)08/08/2022, 15:00
Magnetic monopoles and Q-balls are examples of topological and nontopological solitons, respectively. A new soliton state with both topological and nontopological charges is shown to also exist, given a monopole sector with a portal coupling to an additional scalar field S with a global U(1) symmetry. This new state, the Q-monopole-ball, is more stable than an isolated Q-ball made of only S...
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Mireia Nievas08/08/2022, 15:50
Blazars are key-elements in the understanding of the extragalactic Universe from the astroparticle physics point of view. These sources are jetted radio-loud active galactic nuclei dominated by non-thermal emission that extends across the electromagnetic spectrum. Their emission is a proof of cosmic particle acceleration and the production of ultra-relativistic particles within their physical...
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Vivek Singh (University of California, Berkeley)08/08/2022, 15:50
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ 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 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
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Daniel Kerszberg08/08/2022, 15:50
The Galactic Centre (GC) region is a promising target for dark matter (DM) search due to the size of its halo and proximity. We report on the search for DM spectral gamma-ray lines in the GC region up to gamma-ray energies of 100 TeV with the MAGIC telescopes, located on the island of La Palma (Spain). We present the results obtained with more than 200 hours of large-zenith angle observations...
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Milena Crnogorcevic08/08/2022, 15:50Gravitational wave and multimessenger
The era of multi-messenger astronomy began with the gravitational-wave detection of the binary neutron-star merger, GW170817, in coincidence with a short gamma-ray burst, GRB 170817A. One of its primary goals is a detection of another coincidence of gravitational and electromagnentic emission. With that in mind, we present a follow-up search for excess emission of gamma-rays with the Fermi...
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Vittoria Vecchiotti (GSSI)08/08/2022, 15:50
The Tibet AS$\gamma$ experiment provided the first measurement of the total diffuse gamma-ray emission from the Galactic disk in the sub-PeV energy range.
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Based on analysis of the TeV sources included in the HGPS catalogue, we predict the expected contribution of unresolved pulsar-powered sources in the two angular windows of the Galactic plane observed by Tibet AS$\gamma$.
We show that the... -
Luca Foffano (INAF Rome (IAPS))08/08/2022, 16:10
Absorption and emission lines in the optical spectrum are typically used to investigate the presence of large-scale environments in active galactic nuclei. In BL Lac objects, this approach is hampered by the dominant non-thermal continuum of their relativistic jet, which prevents us from identifying the thermal emission of the photon fields produced by such large-scale structures.
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Julien Dörner (Ruhr University Bochum)08/08/2022, 16:10
The Galactic Center (GC) region has been intensively studied in gamma-rays in the past decades. Fermi LAT has discovered a GeV excess which is not fully understood, and the first detection of a PeVatron by H.E.S.S. indicates the existence of cosmic ray sources providing energies up to a PeV or higher. The emission of TeV gamma rays in the GC is affected by the source position and the...
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Michele Morella08/08/2022, 16:10
LEGEND-1000 [1] is a next-generation ton-scale experiment searching for neutrinoless double beta decay ($0\nu\beta\beta$) of $^{76}$Ge using p-type, high-purity ICPC germanium semiconductor detectors. The experiment is based on 1000 kg of Ge detectors enriched to more than 90$\%$ in $^{76}$Ge. The detectors are operated submerged in liquid argon (LAr), which act as a cooling medium and,...
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Mr Weidong Jin (The University of Alabama, Tuscaloosa)08/08/2022, 16:10
The origin of IceCube astrophysical neutrinos is an important question in astrophysics and neutrino science, and the real-time follow-up of neutrino events in the very-high-energy (VHE, E > 100 GeV) gamma-ray band is a promising way to locate neutrino sources. In 2017, evidence was presented that a flaring gamma-ray blazar, TXS 0506+056, was in spatial and temporal coincidence with the...
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Dan Hooper (Fermilab/University of Chicago)08/08/2022, 16:10Dark Matter
A bright and statistically significant flux of GeV-scale gamma rays has been detected from the region surrounding the Galactic Center. While the spectrum, angular distribution, and intensity of this signal is consistent with the predictions of annihilating dark matter matter particles, it has also been suggested that these gamma rays could potentially be produced by a large population of...
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martin pohl08/08/2022, 16:30
We present a new reconstruction of the distribution of atomic hydrogen in the inner Galaxy that is based on explicit radiation-transport modelling of line and continuum emission and a gas-flow model in the barred Galaxy that provides distance resolution for lines of sight toward the Galactic Center. The main benefits of the new gas model are, a), the ability to reproduce the negative line...
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Xiaojie Wang (Michigan Technological University)08/08/2022, 16:30
The search for the PeVatrons is one of the most important goals of the very-high-energy gamma-ray community. Gamma-rays of energies >100 TeV are produced by particles previously accelerated to PeV energies in astrophysical sources and point back to them because they are not deflected by galactic magnetic fields. Last year, LHAASO published a list of 12 sources emitting gamma rays of energy...
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Lea Alina Heckmann (Max-Planck-Institut für Physik, D-80805 München, Germany)08/08/2022, 16:30
As highly energetic physics laboratories, blazars are prime candidates to reveal the mysteries of the most energetic parts of our universe. For many of them, the very-high-energy (>0.2 TeV, VHE) γ-ray band as well as the X-ray bands are especially interesting since they host the most variable part of their emission.
We present a multiwavelength (MWL) data set of Mrk 501 obtained from 2017...
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David Jason Koskinen08/08/2022, 16:30
Neutrino oscillations remain the sole laboratory signals of Beyond the Standard Model physics and the IceCube Neutrino Observatory detects tens of thousands of atmospheric neutrinos per year which are used for oscillation analyses. Beyond particle physics, neutrino oscillations play an important role for interpreting any astrophysical neutrino fluxes, due to the impact of oscillations over...
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Riki Matsui08/08/2022, 16:30
GW170817 revealed that binary neutron star mergers are accompanied by jets, which are the origin of short gamma-ray bursts (sGRBs), but the production mechanism and dissipation regions of the jets are still unknown. The X-ray lightcurves of sGRBs have extended emission components lasting for 100-1000 seconds, which are considered to be evidence of prolonged engine activity of the jet. Jets by...
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Sylvia Jiechen Zhu08/08/2022, 16:50
Since the first detection of Gravitational-Wave (GW) events in 2015, scientists have been searching for their multimessenger counterparts. Major facilities are taking part in these searches by following up GW events upon their detection. In 2017, the first and only confirmed electromagnetic counterpart to a GW event was found coincident with the neutron star merger GW170817. The High Energy...
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Mehr Un Nisa (Michigan State University)08/08/2022, 16:50
Galactic cosmic rays interact with the Sun’s atmosphere to produce gamma rays via pion decay up to at least 100 GeV. The role of solar magnetic fields in modulating and enhancing the flux of these gamma rays is not completely understood, and can be further elucidated with a broadband spectrum extending into the TeV range. The HAWC observatory is a ground-based array of photo-detectors...
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Stephan O'Brien08/08/2022, 16:50
H 1426+428 is a, so called, extreme high-frequency-peaked BL Lac object (extreme HBL) located at a redshift of z = 0.129 that was detected on a number of occasions by the previous generation of ground-based gamma-ray telescopes (Whipple, CAT and HEGRA), with its VHE flux ranging up to 80% of the Crab Nebula (Crab Units, CU) above a few hundred GeV. Current-generation TeV observatories...
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Prof. Marie-Cécile Piro (University of Alberta)08/08/2022, 16:50
I present a new, open-source, pure Python program, MUTE (MUon inTensity codE) (A. Fedynitch, W. Woodley, M.-C. Piro 2022 ApJ 928 27). MUTE combines the state-of-the-art codes MCEq (Matrix Cascade Equation) and PROPOSAL (PRopagator with Optimal Precision and Optimised Speed for All Leptons) to compute the cosmic ray cascades in the atmosphere and the propagation of muons through matter in...
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Dr Ilias Cholis (Department of Physics, Oakland University)08/08/2022, 16:50
The Galactic Center Excess (GCE) remains one of the most intriguing discoveries from the Fermi Large Area Telescope (LAT) observations. I will revisit the characteristics of the GCE by using a new set of high-resolution galactic diffuse gamma-ray emission templates. This diffuse emission, which accounts for the bulk of the observed gamma rays, is ultimately due to cosmic-ray interactions with...
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Mr RIku Kuze (Tohoku University)08/08/2022, 17:10
The origins of the GeV gamma-rays from nearby radio galaxies are unknown. Hadronic emission from magnetically arrested disks (MADs) around central black holes (BHs) is proposed as a possible scenario. Particles are accelerated in the MAD by magnetic reconnection and stochastic turbulence acceleration. We investigate the feature of the radio galaxies that can be explained by the MAD model. We...
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Antoine David Kouchner (Centre National de la Recherche Scientifique (FR))09/08/2022, 09:00Plenary Talk
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Lu Lu (University of Wisconsin at Madison)09/08/2022, 09:30Plenary Talk
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Carlos A. Argüelles-Delgado (Harvard University)09/08/2022, 10:30Plenary Talk
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Matteo Cerruti09/08/2022, 11:00Plenary Talk
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Giovanni Morlino (INAF)09/08/2022, 11:30Plenary Talk
The origin of Galactic cosmic rays (CR) is still a matter of debate. Supernova remnants (SNR) remains the best candidates thanks to their kinetic luminosity and a well studied acceleration mechanism, the diffusive shock acceleration, which has been shown to efficiently work at the SNR forward shocks. However, recently their ability to accelerate particles up to PeV energies, as required from...
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Kathrin Nippel09/08/2022, 14:00
Using the data from the Large Area Telescope (LAT), the Fermi-LAT collaboration continuously updates their catalogs, which now contain a few thousands of detected gamma-ray sources. Among them, around one third are of not yet identified origin, and they could contain signals from established source types or, most intriguing, new source types such as dark matter subhalos producing gamma-rays...
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Prof. Jacek Niemiec (Institute of Nuclear Physics Polish Academy of Sciences)09/08/2022, 14:00
Particle pre-acceleration remains an important unresolved problem in the diffusive shock acceleration (DSA) theory. This mechanism acting at merger shocks in galaxy clusters is thought to produce relativistic electrons that form the so-called radio relics detected in radio and X-ray. DSA at merger shocks may also generate high- and ultra-high-energy cosmic rays and associated gamma-ray...
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Dr Ian Lawson09/08/2022, 14:00
The DAMIC experiment at SNOLAB uses thick, fully-depleted, scientific grade charge-coupled devices (CCDs) to search for the interactions between proposed dark matter particles in the galactic halo and the ordinary silicon atoms in the detector. DAMIC CCDs operate with an extremely low instrument noise and dark current, making them particularly sensitive to ionization signals expected from...
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Pavel Zhelnin09/08/2022, 14:00Neutrinos
High-energy muon and electron neutrinos yield a non-negligible flux of tau neutrinos as they propagate through Earth. In this talk, the impact of this additional component in the PeV and EeV energy regimes is addressed for the first time. This contribution is predicted to be significantly larger than the atmospheric background above 300 TeV, and so effects future cosmic tau neutrino flux...
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Pedro De la Torre Luque09/08/2022, 14:00
While the accuracy of current cosmic-ray (CR) data allows us to carry out precise tests of our models of propagation of charged particles in the Galaxy, the precision of cross sections data for the production of secondary particles (secondary CRs, neutrinos, gamma rays) is very poor, considerably limiting these tests. Given that most of the calculations of these cross sections from fundamental...
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Dr steven prohira (The Ohio State University)09/08/2022, 14:20
At the highest energies, the neutrino nucleon cross-section $\sigma$ can only be measured via interaction of ultrahigh energy (UHE) neutrinos with target particles in the Earth. The energies involved ($E_{\nu} \geq 10^{16}$ eV) probe $\sqrt{s}$ higher than anything possible at current colliders. Measurement of $\sigma$ at these energies will directly probe new physics models. Many current and...
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Celine Armand09/08/2022, 14:20
Cosmological and astrophysical observations suggest that 85% of the total matter of the Universe is made of Dark Matter (DM). However, its nature remains one of the most challenging and fundamental open questions of particle physics. Assuming particle DM, this exotic form of matter cannot consist of Standard Model (SM) particles. Many models have been developed to attempt unraveling the nature...
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Marco Chianese (University of Naples Federico II & INFN)09/08/2022, 14:20Extragalactic Sources
Experimental observations have demonstrated a strong correlation between star-forming processes and gamma-ray luminosities. However, the very nature of these emissions is still under debate. Certainly, star-forming and starfurst galaxies (SFGs and SBGs) are well-motivated astrophysical emitters of gamma-rays and neutrinos through hadronic collisions. In this talk, I will present several...
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Einar Urdshals09/08/2022, 14:20Dark Matter
We develop a novel formalism to describe the scattering of dark matter (DM) particles by electrons bound in detector materials such as silicon, germanium and graphene for a general form of the underlying DM-electron interaction. By applying non-relativistic effective field theory methods, we find that the DM and material physics factorise into a handful of DM and material "response functions"....
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Keith McBride09/08/2022, 14:20
Galactic cosmic ray nuclei have been measured at the GeV and TeV scale, confirming a diverse set of elemental species. These measurements heavily impact our understanding of both Galactic accelerator candidates and cosmic ray propagation. Light cosmic ray isotope abundances deliver a crucial and independent measurement on the latter. Long-lived unstable nuclei such as beryllium-10 provide a...
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Mr Brandon Roach (Department of Physics, Massachusetts Institute of Technology)09/08/2022, 14:40
Dark matter at the keV scale has become an active topic in the last decade. The NuSTAR x-ray observatory, with its energy bandpass 3--150 keV and wide-angle aperture for unfocused x-rays, is an ideal platform to search for decaying keV-scale dark matter, e.g. sterile neutrinos. Previous NuSTAR analyses constrained much of the sterile-neutrino parameter space for masses ~10--40 keV, improving...
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Christopher Cappiello09/08/2022, 14:40
Direct detection experiments set strong constraints on dark matter-nucleus scattering, but are typically limited to probing dark matter velocities of order 10^-3 c. If there exists a sub-population of dark matter with much larger velocity, considering this population could make direct detection experiments sensitive to smaller dark matter mass, while also improving their sensitivity to cross...
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Shigeo Kimura09/08/2022, 14:40
The origins of cosmic MeV gamma-ray and high-energy neutrino backgrounds have been veiled in mystery since their discoveries. In this talk, I will propose raidiatively inefficient accretion flows in low-luminosity active galactic nuclei (AGN) as the common source of these backgrounds. Thermal electrons in low-luminosity AGN emit MeV gamma-rays by the Comptonization process, while non-thermal...
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Damiano Fiorillo (Niels Bohr Institute, University of Copenhagen)09/08/2022, 14:40
The detection of ultra-high-energy neutrinos, with energies above 100 PeV, is requisite to fully understand the high-energy Universe. Their discovery might soon be within reach of upcoming neutrino telescopes, yet in-depth discovery forecasts for their astrophysical sources are largely unavailable. We present a robust framework to compute the statistical significance of source discovery via...
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Mr Yao Chen (Shandong Institute of Advanced Technology (SDIAT) (CN))09/08/2022, 14:40Cosmic Rays
We present high statistics measurements of the secondary cosmic rays Lithium, Beryllium, Boron, and Fluorine based on 10 years of AMS data. The properties of the secondary cosmic ray fluxes and their ratios to the primary cosmic rays Li/C, Be/C, B/C, Li/O, Be/O, B/O, and F/Si are discussed. The systematic comparison with the latest GALPROP cosmic ray model is presented.
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Prof. Jong-Chul Park (Chungnam National University)09/08/2022, 15:00
We propose a novel mechanism of boosting dark matter by cosmic-ray neutrinos. The new mechanism is so significant that the arriving flux of cosmic-ray neutrino boosted dark matter (νBDM) lighter than O(1) MeV on Earth substantially larger than the one of the cosmic-ray electron boosted dark matter. Therefore, νBDM can dominantly contribute in direct detection experiments. We derive...
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Mr Victor Branco Valera Baca09/08/2022, 15:00
The measurement of high-energy neutrino-matter interactions furthers our knowledge of nucleon structure and allows us to test proposals beyond the Standard Model: the higher the energy, the more piercing the probe. Ultra-high-energy (UHE) cosmic neutrinos, with EeV-scale energies (1 EeV = 10^{18} eV), offer the ultimate high-energy probes of neutrino physics. For fifty years, they have evaded...
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Aion Viana (IFSC-USP)09/08/2022, 15:00
The true nature of the largest matter density component of the Universe, the so-called dark matter, is one of the most elusive problems of Physics. One primary candidate to explain dark matter are Weakly Interacting Massive Particles (WIMPs), as they provide the right relic density with a cross-section at the electroweak scale, however, up-to-date no WIMP signals were observed until now....
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Jiahui Wei (Shandong Institute of Advanced Technology (SDIAT) (CN))09/08/2022, 15:00
We present high statistics measurements of cosmic H, He, Li and Be isotopes based on 10 years of AMS data.
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Matthew Lundy (McGill University)09/08/2022, 15:00
Gamma-ray observations of extreme astrophysical transient phenomena continue to play an important role in understanding both the physical emission mechanisms in these sources and their contribution to the cosmic-ray population. One transient class that continues to expand, but remains difficult to understand, are Fast Radio Bursts (FRBs). Due to their sporadic and short-lived emission (~ms),...
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Dr Daniel Gilman09/08/2022, 15:50
Dark matter halos and subhalos less massive than 10^9 solar masses hold the key to understanding the nature of dark matter, including its formation mechanism, particle mass, and possible interactions. In particular, self-interacting dark matter (SIDM) prescribes a dynamic evolution of halo density profiles that distinguishes it from cold dark matter. This process begins with core formation,...
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78. First Science Results from the Large-Sized Telescope prototype for The Cherenkov Telescope ArrayDavid Green09/08/2022, 15:50
The Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array (CTA) are designed to maximize the performance of gamma-ray studies for low energies, rapid telescope re-pointing, large field of view, and unprecedented flux sensitivity. The LST will dominate the performance of the CTA Observatory between 20 GeV and 150 GeV. The prototype of the LST telescopes (LST-1) was inaugurated in 2018...
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Mr Benjamin Smithers (University of Texas at Arlington)09/08/2022, 15:50
The IceCube Neutrino Observatory has sensitivity to sterile neutrino oscillations through matter-enhanced oscillation occurring in the few TeV energy range for eV$^{2}$-scale mass-squared splittings. I will present previous measurements of these effects in $\nu_\mu$ disappearance, which has strong sensitivity to the mixing angle $\theta_{24}$ via $\bar{\nu}_\mu\rightarrow\bar{\nu}_s$...
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Valentina De Romeri09/08/2022, 15:50
Primordial black holes (PBHs) are a potential dark matter candidate whose masses can span over many orders of magnitude. If they have masses in the 10^15 − 10^17 g range, they can emit sizeable fluxes of MeV neutrinos through evaporation via Hawking radiation. We explore the possibility of detecting light (non-)rotating PBHs with future neutrino experiments DUNE and THEIA. We will show that...
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Yi Jia (Massachusetts Inst. of Technology (US))09/08/2022, 15:50
We present high statistics measurements of primary cosmic rays from Proton to Iron based on 10 Years AMS data. The properties of primary cosmic ray fluxes are discussed. The systematic comparison with the latest GALPROP cosmic ray model is presented.
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Dr Marco Chianese (University of Naples Federico II & INFN)09/08/2022, 16:10
The direct detection of sub-GeV dark matter interacting with nucleons is hampered by the low recoil energies induced by scatterings in the detectors. This experimental difficulty is avoided in the scenario of boosted dark matter where a component of dark matter particles is endowed with large kinetic energies. In this talk, I will show that the current evaporation of primordial black holes...
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Jose Carpio (Penn State University)09/08/2022, 16:10
Beyond the Standard Model (BSM) interactions in the neutrino sector have been of much interest in cosmology and astroparticle physics. We developed a Monte Carlo code to investigate the neutrino time delay distribution caused by BSM interactions en route to the observer. While we find excellent agreement for small optical depths, the optically thick limit show features that are not described...
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Prof. Jacek Niemiec (Institute of Nuclear Physics Polish Academy of Sciences)09/08/2022, 16:10
We present first results of the commissioning data of two Single-Mirror Small-Sized Telescopes (SST-1M) for detection of gamma rays with the imaging air Cherenkov technique. SST-1M adopts a Davies-Cotton optics and a fully digitising silicon photomultipliers (SiPM) based camera. SST-1M telescopes have a lightweight and compact structure with 4 m-diameter mirror dish composed of 18 hexagonal...
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121. Unique Properties of the 3rd Group of Cosmic Rays: Results from the Alpha Magnetic SpectrometerDr Valerio Formato (INFN - Sezione di Roma Tor Vergata)09/08/2022, 16:10
Cosmic Nitrogen, Sodium, and Aluminum nuclei are a combination of primaries, produced at cosmic-ray sources, and secondaries resulting from collisions of heavier primary cosmic rays with the interstellar medium. We present high statistics measurements of the N, Na and Al rigidity spectra. We discuss the properties and composition of their spectra and present a novel model-independent...
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Mr Birendra Dhanasingham (The University of New Mexico)09/08/2022, 16:10
Strong gravitational lensing provides a promising way to look for clues to the elusive particle nature of dark matter. Indeed, subtle perturbations to lensed images can reveal the dark-matter distribution on sub-galactic scales. In addition to the subhalos of the main lens, a significant contribution to these perturbations comes from dark matter halos along the line-of-sight between the...
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Dr Seodong Shin (University of Chicago / Yonsei University)09/08/2022, 16:30Dark Matter
We emphasize the distinctive cosmological dynamics in multi-component dark-matter scenarios and its impact in probing a sub-dominant component of dark matter.
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The dynamics originates from the conversion among different dark-matter components.
We find that the temperature of the self-interacting sub-component dark matter is significantly enhanced by the dark-matter annihilation into the... -
Keir Rogers09/08/2022, 16:30
The fundamental nature of dark matter so far eludes direct detection experiments, but it has left its imprint in the large-scale structure (LSS) of the Universe. Extracting this information requires accurate modelling of structure formation and careful handling of astrophysical uncertainties. I will present new bounds using the LSS on two compelling dark matter scenarios that are otherwise...
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Daniel Kerszberg09/08/2022, 16:30
The Cherenkov Telescope Array (CTA) will be the next generation ground-based observatory for gamma-ray astronomy and will consist of Imaging Atmospheric Cherenkov Telescopes (IACTs) distributed over two sites, one in the northern and one in the southern hemisphere. CTA will detect gamma rays from 20 GeV to 300 TeV by means of three different telescope sizes. The sub-array of four Larged-Sized...
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Michael Korsmeier (Stockholm University and OKC)09/08/2022, 16:30
The AMS-02 experiment has provided high-precision measurements of several cosmic-ray (CR) species. I plan to review the implication of the CR measurements of antiprotons, protons, helium, helium 3, boron, carbon, nitrogen, and oxygen. The achieved percent-level accuracy allows us, for example, to investigate different CR propagation scenarios or to study the universality of CR acceleration, a...
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Po Wen Chang (CCAPP, Ohio State University)09/08/2022, 16:30
Neutrinos remain mysterious. As an example, enhanced self-interactions (νSI), which would have broad implications, are allowed. At the high neutrino densities within core-collapse supernovae, νSI should be important, but robust observables have been lacking. We show that νSI make neutrinos form a tightly coupled fluid that expands under relativistic hydrodynamics. The outflow becomes either a...
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Dr Baishan Hu (TRIUMF)09/08/2022, 16:50
We present converged ab initio calculations [1] of structure factors for elastic spin-dependent WIMP scattering off all nuclei used in dark matter direct-detection searches: 19F, 23Na, 27Al, 29Si, 73Ge, 127I, 129Xe, and 131Xe. From a set of established two- and three-nucleon interactions derived within chiral effective field theory, we construct consistent WIMP-nucleon currents at the one-body...
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Adam Smith-Orlik (York University)09/08/2022, 16:50
The isothermal Jeans model is a semi-analytical approach to modelling galaxies and galaxy clusters with self-interacting dark matter (SIDM) that has been shown to work remarkably well. Recent studies have found great success testing Jeans model predictions for SIDM halos against both observations and simulations while assuming spherical symmetry. In the presence of baryons SIDM halos are known...
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Andrew Smith09/08/2022, 16:50
HAWC and LHAASO provided a new look at the gamma-ray sky. With high sensitivity through the use of the water-Cherenkov particle detection method, these instruments have been able to achieve unprecedented sensitivity and have detected gamma rays up to 1 PeV. Their wide fields and continuous operation make them highly complementary to CTA and other IACTs. The Southern Wide-field Gamma-ray...
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Dr Valerio Formato (INFN - Sezione di Roma Tor Vergata)09/08/2022, 16:50
The High Energy cosmic-Radiation Detection (HERD) facility is one of several space astronomy payloads onboard the future Chinese Space Station (CSS), planned for operation starting around 2027 for about 10 years. HERD is a China-led mission with key European contributions led by Italy. The primary scientific objectives of HERD are: Indirect dark matter search with unprecedented sensitivity;...
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187. Measuring dark matter subhalos in strong lenses with truncated marginal neural ratio estimationAdam Coogan09/08/2022, 17:10
Strongly-lensed galaxies are a unique laboratory for probing dark matter substructure and testing the fundamental assumptions of the ΛCDM paradigm. However, the statistical difficulties with analyzing such observations are formidable, requiring disentangling the source galaxy’s light from the lens’ mass distribution and marginalizing over different substructure configurations. In this talk I...
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Marie Cécile Piro (University of Alberta)10/08/2022, 09:00Plenary Talk
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Hugh Lippincott (UCSB)10/08/2022, 09:30Plenary Talk
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Rebecca Leane (SLAC)10/08/2022, 10:30Plenary Talk
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Gopolang Mohlabeng (University of California, Irvine)10/08/2022, 11:00Plenary Talk
Low mass fast moving/energetic dark matter (DM) is very well motivated and has been a subject of attention in the literature. These fast-moving particles can gain enough kinetic energy to pass the thresholds of some Large volume terrestrial detectors. For instance, fast-moving or "boosted" DM can account for the recent excess in electron recoil events observed by the XENON1T detector, due to...
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Dr Mireia Nievas10/08/2022, 11:30Plenary Talk
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Elena Pinetti (Fermilab)10/08/2022, 14:00
Dark matter in cosmic structures is expected to produce signals that originate from its particle-like nature, among which the electromagnetic emission represents a relevant opportunity. However, this emission is very faint and contributes only to the unresolved background radiation. This background emission is isotropic at first order, but exhibits a degree of anisotropy since it originates...
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Ievgen Vovk10/08/2022, 14:00
Secondary gamma-ray emission from distant TeV sources induced by the effects of propagation of gamma rays through the intergalactic medium could be used to probe the intergalactic magnetic field (IGMF). A proper realization of this opportunity requires a knowledge on the evolution of the source luminosity from GeV to TeV energies over the relevant period of time. Here we use a sample of MAGIC,...
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Andrii Tykhonov (Universite de Geneve (CH))10/08/2022, 14:00
We present the first results of the ERC PeVSPACE project, aimed at fundamentally improving the precision of direct cosmic ray measurements at the highest energies – in the TeV–PeV range, on DArk Matter Particle Explorer (DAMPE) and High Energy Radiation Detector (HERD) experiments.
DAMPE and HERD provide a unique opportunity of directly probing cosmic ray spectra close to the “knee”....
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Manuel Silva10/08/2022, 14:00
The IceCube Neutrino Observatory is a cubic kilometer-sized detector designed to detect astrophysical neutrinos. However, cosmic rays interacting in the atmosphere produce a significant number of muons in the southern equatorial sky. This work outlines a new dataset with large background rejection and high signal efficiency using a boosted decision tree. This dataset is also effective at...
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Mr Daniel Durnford (University of Alberta)10/08/2022, 14:00
The NEWS-G direct dark matter search experiment uses spherical proportional counters (SPC) with light noble gasses to explore low WIMP masses. The current iteration of the experiment consists of a large 140 cm diameter SPC installed at SNOLAB with a new sensor design, and lots of improvements in detector performance and data quality. Before its installation at SNOLAB, the detector was operated...
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Erik Ganster (RWTH Aachen University)10/08/2022, 14:20
The IceCube Neutrino Observatory has been observing a diffuse flux of high-energy astrophysical neutrinos in multiple detection channels since 2013. These detection channels are complementary with respect to event topologies such as muon tracks and cascades, the sensitive energy range, and backgrounds. In this analysis we combine two of these channels, through-going muon tracks and contained...
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Dr Paolo Da Vela (University of Innsbruck)10/08/2022, 14:20
The origin of the large-scale magnetic fields in the Universe is one of the long-standing problem in cosmology. To discriminate among the different explanations it is crucial to measure the intergalactic magnetic field (IGMF) in the voids among the galaxies. Gamma-rays coming from extragalactic sources can be used to constrain the IGMF due to their interaction with the intergalactic medium....
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Simon Viel (Carleton University)10/08/2022, 14:20
The latest results from DEAP-3600 will be presented, including the best constraints on TeV-scale mass dark matter scattering in argon, and world-leading constraints on Planck-scale mass dark matter. DEAP-3600 is located at SNOLAB, 2 km underground in Sudbury, Ontario. This spherical detector consists of 3.3 tonnes of liquid argon in a large ultralow-background acrylic cryostat instrumented...
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Dr katayose yusaku (Yokohama National University)10/08/2022, 14:20
We are observing extensive air showers using the Tibet-III air shower array and the undergound water-Cherenkov Muon Detector array (MD) to measure the chemical composition of cosmic rays around the knee energy region. We have developed a method to select air showers induced by primary protons with the energy between 40 TeV and 630 TeV by using the number of muons detected by the MD in each...
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Caleb Gemmell (University of Toronto)10/08/2022, 14:20
Parton showers are part and parcel of particle phenomenology, but what in the case of a confining dark sector with no light quarks below the confinement scale? Then the only available hadronic states are ‘glueballs’, composite gluon states. To date, there have been very few quantitative studies of dark shower signatures with glueball final states, despite the fact they commonly appear in...
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Marek Bohdan Walczak (University of Warsaw (PL))10/08/2022, 14:40
The Technical Design of the DarkSide-20k experiment has been finalised and the detector construction in the Gran Sasso National Laboratory in Italy starts this year. The experiment is designed to observe WIPMs scattering from argon atoms in 20 tonnes of the liquid argon target. Scintillation light generated during the interaction is detected by planes of Silicon photomultipliers (SiPMs). The...
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Ms Vasundhara Shaw10/08/2022, 14:40
The paths of cosmic rays are deflected upon passing through the Galactic magnetic field structure. The strength of the deflections that these cosmic rays undergo is dependent on the strength and structure of the Galactic magnetic field. Unfortunately, our knowledge of the Galactic magnetic field is very limited, especially when considering the fields present in the Galactic halo region. In...
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Celine Armand10/08/2022, 14:40
Cosmological and astrophysical probes suggest that dark matter (DM) would make up for 85\% of the total matter content of the Universe. However, the determination of its nature remains one of the greatest challenges of fundamental physics. Assuming the $\Lambda$CDM model, Weakly Interacting Massive Particles (WIMPs) would annihilate into Standard Model particles, such as $\gamma$ rays, which...
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Richard Naab (DESY Zeuthen)10/08/2022, 14:40
The IceCube Neutrino Observatory has been observing a diffuse astrophysical neutrino flux, measuring the energy spectrum and flavor composition in different detection channels. With about 10 years of data, we combine the detection channels focused on the event topologies of tracks and cascades to measure the energy spectrum and flavor composition with improved precision compared to the...
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Dennis Soldin10/08/2022, 14:40
The IceTop array, located at the surface of the IceCube Neutrino Observatory, is currently used as a veto for the in-ice neutrino detector as well as a cosmic ray detector. Built from 162 ice Cherenkov tanks, its sensitivity has been reducing over the operational years due to snow accumulation on the tanks. In order to mitigate this issue as well as further increase the accuracy of cosmic-ray...
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Sunniva Jacobsen10/08/2022, 15:00
Axion-like particles (ALPs) are a broad class of pseudo-scalar bosons that generically arise from broken symmetries in extensions of the standard model. In many scenarios, ALPs can mix with photons in regions with high magnetic fields. Photons from distant sources can mix with ALPs, which then travel unattenuated through the Universe, before they mix back to photons in the Milky Way galactic...
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Frank McNally10/08/2022, 15:00
The complete IceCube Observatory has collected over 620 billion cosmic-ray induced muon events from May 2011 to May 2021. These unprecedented statistics make it possible to observe significant structure in the cosmic-ray arrival direction distribution at both higher cosmic-ray energies and smaller angular scales. Combined with improved simulation and systematics, we can provide a newly...
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Thomas Nathan Thorpe (University of California Los Angeles (US))10/08/2022, 15:00
Darkside-20k will exploit the physical and chemical properties of liquid argon housed within a large dual-phase time project chamber (TPC) in its direct search for dark matter. The TPC will utilize a compact, integrated design with many novel features to enable the 20t fiducial volume of underground argon. Underground argon (UAr) is sourced from underground CO2 wells and depleted in the...
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Ariane Dekker (University of Amsterdam)10/08/2022, 15:00
Warm dark matter (WDM) could explain some small-scale structure observations that have challenged the cold dark matter (CDM) model, as warm particles suppress structure formation due to free streaming effects. Observing small-scale structure thus provides a valuable way to distinguish between CDM and WDM. In this talk, I will present a semi-analytical model of the dark matter substructure...
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Sarah Mancina (University of Wisconsin -- Madison)10/08/2022, 15:50
Astrophysical neutrinos are an important piece of the TeV multimessenger astrophysics puzzle. However, the significant background of atmospheric neutrinos seen in our neutrino observatories makes it difficult to study neutrino sources below 100 TeV in the southern sky Looking for starting events from the southern sky with IceCube allows us to reject not only events from incoming atmospheric...
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Francesca Giovacchini (Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))10/08/2022, 15:50
The Alpha Magnetic Spectrometer collected over 150 billion cosmic rays events during the first 8.5 years of operation aboard the International Space Station. A component of Z>2 ions with rigidities below the rigidity cutoff and located in the South Atlantic Anomaly have been measured both in the down-going and up-going direction.
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Bangale P., for the VERITAS Collaboration. (University of Delaware)10/08/2022, 15:50
Galactic PeVatrons are astrophysical sources accelerating particles up to a few PeV ($\sim$10$^{15}$ eV). The primary identification of both electron and proton PeVatrons is gamma-ray radiation at ultra-high energies (UHE, E$>$100 TeV). Recently, LHAASO detected 14 steady gamma-ray sources with photon energies above 100 TeV and up to 1.4 PeV. Most of these sources contain possible source...
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Mr David J. G. Marques (Gran Sasso Science Institute)10/08/2022, 15:50
We are going to present the CYGNO/INITIUM project, an experiment that emerges as a new approach for directional Dark Matter searches using a gaseous TPC with the purpose of detecting low mass (0.5-50 GeV) WIMPS and performing solar neutrino spectroscopy. This project distinguishes itself by the use of He:CF$_4$, a low-density gas mixture sensitive to both spin dependent and independent...
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Leonardo Mastrototaro10/08/2022, 16:10
The detection of very high-energy neutrinos by the IceCube experiment supports the existence of a comparable gamma-ray counterpart from the same cosmic accelerators. Under the likely assumption that the sources of these particles are of extra-galactic origin, even for transparent sources the photon flux would be significantly absorbed during its propagation over cosmic distances. However, in...
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Dr Jakub Jurysek (University of Geneva - Department of Astronomy)10/08/2022, 16:10
LHAASO J2108+5157 is the first gamma-ray source directly discovered in the Ultra-High-Energy band by the LHAASO collaboration. Two molecular clouds identified in the direction towards LHAASO J2108+5157 make the source a promising galactic PeVatron candidate. In 2021, the Large-Sized Telescope prototype (LST-1) of the Cherenkov Telescope Array (CTA) Observatory performed observations of LHAASO...
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Ms Rasa Muller10/08/2022, 16:10
Neutrino astronomy is a rapidly evolving discipline probed by large-volume neutrino detectors such as the ones being built by the KM3NeT collaboration in the Mediterranean Sea together instrumenting a cubic kilometre of seawater. ARCA is the high-energy unit of this network. In its full configuration of 230 lines with > 10^5 photomultiplier tubes installed, it will be sensitive to neutrinos in...
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Guillaume Giroux (Queen's University)10/08/2022, 16:10
The PICO collaboration searches for WIMPs using large superheated liquid detectors, or bubble chambers. Recent results from the complete exposure of the PICO-60 C$_3$F$_8$ detector at SNOLAB set the world’s most stringent limits on WIMP-proton spin-dependent interactions. I will present the current status of the construction and physics potential of the next generation, tonne-scale experiment...
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Mohamad Shalaby (AIP Potsdam)10/08/2022, 16:10
Thermal electrons cannot directly participate in the process of diffusive acceleration at electron-ion shocks because their Larmor radii are smaller than the shock transition width: this is the well-known electron injection problem of diffusive shock acceleration. Instead, an efficient pre-acceleration process must exist that scatters electrons off of electromagnetic fluctuations on scales...
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Erez Etzion (Tel Aviv University (IL))10/08/2022, 16:30
The SENSEI Experiment leads the direct-detection searches for sub-GeV dark matter (DM) using the novel Skipper-CCD sensors. The Skipper-CCDs can provide repetitive non-destructive readouts of a single pixel’s charge reducing the noise to a negligible level and reaching a single electron distinction.
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Already with the small-scale prototype runs, SENSEI achieved the lowest rates in silicon... -
Dr Marcel Strzys (ICRR, The University of Tokyo), Marcel Strzys (ICRR, The University of Tokyo)10/08/2022, 16:30
The supernova remnant SNR G106.3+2.7 in the proximity of the Boomerang PWN has recently gained a lot of attention due to the emission above 100 TeV detected by HAWC, Tibet ASγ, and LHAASO. This SNR shows a characteristic comet-like morphology in radio observations, with a head and a tail. Due to the limited angular resolution of air shower experiments, it is not clear if the emission comes...
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Milena Crnogorcevic10/08/2022, 16:30Dark Matter
Axion-like particles (ALPs) are a well-motivated candidate for constituting a significant fraction of dark matter. They are produced in high-energy environments, such as core-collapse supernovae (CCSNe), and could undergo conversion into gamma-rays in the presence of an external magnetic field, with a characteristic spectrum peaking in the 30--100-MeV energy range. CCSNe are often invoked as...
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Dr Thomas McElroy (U. Alberta)10/08/2022, 16:30
The Pacific Ocean Neutrino Experiment (P-ONE) is a proposed cubic kilometre class neutrino telescope two hundred kilometres off the coast of Vancouver Island, Canada. A partnership with Ocean Network Canada (ONC) brings extensive knowledge, experience, and infrastructure to build a novel large-scale neutrino telescope in the ocean. P-ONE's primary scientific goals are to advance the field of...
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Zhili Weng (Massachusetts Inst. of Technology (US))10/08/2022, 16:30
Precision measurements of cosmic ray positrons are presented up to 1.4 TeV based on 3.4 million positrons collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron flux exhibits complex energy dependence. Its distinctive properties are: (a) a significant excess starting from 24.2 GeV compared to the lower-energy, power-law trend; (b) a sharp drop-off above...
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Dr Tomas Gonzalo (RWTH Aachen)10/08/2022, 16:50
Axion-like particles (ALPs) decaying before the time of recombination can have
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strong implications in a range of cosmological and astrophysical observations. In this
talk I present a global analysis of a model of decaying ALP, focusing specifically on their
coupling to photons. Exploiting the multidisciplinary nature of the GAMBIT frame-
work, we combine state-of-the-art calculations of... -
Zhili Weng (Massachusetts Inst. of Technology (US))10/08/2022, 16:50Cosmic Rays
Latest results by AMS on the fluxes and flux ratios of charged elementary particles in the absolute rigidity range from 1 up to 2000 GV reveal unique properties of cosmic charged elementary particles. In the absolute rigidity range ~60 to ~500 GV, the antiproton flux and proton flux have nearly identical rigidity dependence. This behavior indicates an excess of high energy antiprotons compared...
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Brydyn Mac Intyre (University of Manitoba, Department of Physics and Astronomy)10/08/2022, 16:50
W50/SS433 is a complex and fascinating system that represents an important test bed for many astrophysical processes. Powered by the microquasar SS 433, the W50 nebula — classified as a supernova remnant with an unusual double-lobed morphology reminiscent of a Manatee — has been proposed to be a Galactic PeVatron candidate; a scenario that has been recently revived with the detection of very...
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William Melbourne (The University of Melbourne)10/08/2022, 16:50
The SABRE (Sodium iodide with Active Background REjection) experiment aims to detect an annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals in order to provide a model independent test of the signal observed by DAMA/LIBRA. It is made up of two separate detectors; SABRE South located at the Stawell Underground Physics Laboratory (SUPL), in regional...
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Philippe Di Stefano10/08/2022, 17:10
Potassium-40 (40K) is a naturally-occurring radioactive isotope. It is a background in rare-event searches, plays a role in geochronology, and has a nuclear structure of interest to theorists. This radionuclide decays mainly by beta emission to calcium, and by electron-capture to an excited state of argon. The electron-capture decay of 40K directly to the ground state of argon has never been...
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Jeremy Perkins (NASA/GSFC)11/08/2022, 09:00Plenary Talk
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Lars Mohrmann (Max Planck Institute for Nuclear Physics, Heidelberg)11/08/2022, 09:30Plenary Talk
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Cecilia Lunardini11/08/2022, 10:30Plenary Talk
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Gabriel Orebi Gann (UC Berkeley / LBNL)11/08/2022, 11:00Plenary Talk
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Abigail Vieregg (University of Chicago)11/08/2022, 11:30Plenary Talk
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Dr Michael A. Fedderke (Johns Hopkins University)11/08/2022, 14:00
In this talk, I will evaluate the potential for gravitational-wave (GW) detection in the frequency band from 10 nHz to 1 $\mu$Hz using extremely high-precision astrometry of a small number of stars. In particular, I will argue that non-magnetic, photometrically stable hot white dwarfs (WD) located at $\sim$ kpc distances may be optimal targets for this approach. Previous studies of astrometric...
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Sara Rebecca Gozzini11/08/2022, 14:00
Extraterrestrial neutrinos can be used as messengers to probe the presence of dark matter particles in the Milky Way. Indeed, sizable fluxes of high-energy neutrinos are expected from pair annihilation and decay of dark matter in regions where it accumulates to a high density. Massive celestial bodies such as the Sun and the very large reservoir at the Galactic Centre are inside the field of...
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Benedikt Schroer11/08/2022, 14:00
The recent detection of the Geminga PWN by HAWC in the multi-TeV band allows us to infer precious information about the transport of pairs in the immediate surroundings of the pulsar and on the spectrum of pairs contributed by a Geminga-like pulsar to the spectrum of pairs in the cosmic radiation. Moreover, this detection allows us to address the issue of how typical are the so-called TeV...
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Alessio Berti (Max Planck Institute for Physics)11/08/2022, 14:00
After almost two decades of searches, in January 2019, MAGIC unambiguously detected TeV emission from the gamma-ray burst GRB 190114C. This long-awaited detection marked the beginning of the very high energy (VHE, $E>100$ GeV) era for GRB studies. After this historical achievement, the MAGIC collaboration continued its effort in the follow-up of GRBs. In December 2020, MAGIC detected GRB...
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Nassim Bozorgnia (York University, University of Alberta)11/08/2022, 14:00
If the dark matter annihilation cross section is velocity dependent, the dark matter pair-wise relative velocity distribution enters into the calculation of the annihilation signals and the so-called J-factors. Studies of velocity-dependent dark matter annihilation commonly rely on simplified analytic models for the dark matter phase space distribution, which need to be tested against...
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Joshua Ziegler11/08/2022, 14:20
Stars whose initial mass is between approximately 150 and 240 M$_\odot$ face a fate of complete explosion in a pair instability supernova (PISN). However, by injecting energy into the star, it may be possible in some cases to avoid this fate. We outline conditions on this energy injection which can lead to the survival or incomplete explosion of the star, and we discuss how dark matter...
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Diyaselis Delgado Lopez (Harvard University (US))11/08/2022, 14:20
Dark matter (DM) particles are predicted to decay into Standard Model particles which would produce signals of neutrinos, gamma-rays, and other secondary particles. Neutrinos provide an avenue to probe astrophysical sources of DM particles. We review the decay of dark matter into neutrinos over a range of dark matter masses from MeV/c2 to ZeV/c2. We examine the expected contributions to the...
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Sylvia Jiechen Zhu11/08/2022, 14:20
The multiwavelength observation of GRB 190114C, an extremely bright gamma-ray burst (GRB), opens a new window for studying the emission mechanism of GRBs. The Very-High-Energy (VHE; >100 GeV) detection by MAGIC suggested the inverse Compton process as the emission mechanism for the VHE gamma rays during the early afterglow phase of the burst. However, other VHE GRB detections have casted doubt...
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Aswathi Balagopal V.11/08/2022, 14:20
The IceCube Neutrino Observatory at the South Pole has detected an astrophysical flux of high-energy neutrinos. Searches for the sources of these astrophysical neutrinos are performed with these detections which have energies above several 100s of GeV. A dense infill array called DeepCore lowers IceCube's energy threshold to a few GeV, enabling additional searches for low-energy astrophysical...
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Jamie Holder11/08/2022, 14:20
The VERITAS imaging atmospheric Cherenkov telescope array has been operating regularly since 2007. One of the key science programs for VERITAS throughout its lifetime has been searching for and monitoring gamma-ray binary systems. These systems are comprised of a massive star and a compact object, either black hole or neutron star, with the peak energy output of their emission occuring in the...
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Davide Miceli (University & INFN Padova)11/08/2022, 14:40
Gamma-ray burst (GRB) emission in the very high energy (VHE, E>100GeV) band has been discussed and theorized for many years, but has eluded for a long time the observations. Only in the last years the Cherenkov telescopes MAGIC and H.E.S.S. have unequivocally proven that VHE GRB afterglow radiation is produced up to a few TeV for at least a (sub-)class of GRBs. This newly opened TeV spectral...
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Pedro De la Torre Luque11/08/2022, 14:40Cosmic Rays
TeV halos have become a new class of astrophysical objects which were not predicted before their recent observation. They offer evidence that diffusion around sources (concretely, pulsars) is not compatible with the effective average diffusion that our models predict for the Galaxy. This directly impacts Galaxy formation, our knowledge of the propagation process throughout the Galaxy and our...
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Shiuli Chatterjee11/08/2022, 14:40
Neutron stars (NS) of age >10^9 yrs exhaust thermal and rotational energies and cool down to temperatures below \mathcal{O}(100) K. Accretion of particle dark matter (DM) by such NS can heat them up through kinetic and annihilation processes. This increases the NS surface temperature to a maximum of \sim 2600 K in the best case scenario. The maximum accretion rate depends on the DM ambient...
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Neal Avis Kozar11/08/2022, 14:40
In the search for particle dark matter (DM) the most prominent model is the Weakly Interacting Massive Particle (WIMP). This work uses Non-Relativistic Effective Operators (NREOs) from corresponding effective field theory (EFT) to describe WIMP DM interactions. The advantage of the NREO formalism is its ability to describe interactions outside the typical spin dependent and spin independent...
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Ilja Jaroschewski (Ruhr-University Bochum)11/08/2022, 14:40
The diffuse astrophysical neutrino flux was first detected by IceCube in
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2013. With the high-probability association of a high-energy neutrino to the
blazar TXS0506+056 in 2017 and several more neutrino-blazar associations
since then, there is an indication that at least a non-negligible part of this
diffuse neutrino flux originates from blazars.
As over ninety stellar mass binary black... -
Dezhi Huang (Michigan Tech)11/08/2022, 15:00
LS 5039 is a high mass X-ray binary with an orbital periodicity of 3.9 days located about 1.5 degrees from the galactic plane. Previously, the H.E.S.S. telescope detected very high energy gamma-ray emissions from this source and measured the spectral energy in a broad inferior conjunction phase
Go to contribution page(0.45<phi<0.9)and a complimentary superior conjunction phase. However, the behavior of the... -
Jarred Roberts (University of California San Diego)11/08/2022, 15:00
The Compton Spectrometer and Imager (COSI) is a Small Explorer (SMEX) satellite mission selected by NASA for development. COSI is a wide-field telescope designed to survey the entire gamma-ray sky at 0.2-5 MeV. It provides imaging, spectroscopy, and polarimetry of astrophysical sources, and its germanium detectors provide excellent energy resolution for emission line studies. The science...
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Karen Macías Cárdenas (Queen's University)11/08/2022, 15:00
The nature of Dark Matter is an ongoing and relevant object of study in astroparticle physics. Despite our best efforts to identify its possible particle properties, the results have been null, which has led to a plethora of models describing viable connections to the Standard Model. In particular, loop models of Dark Matter, like the scotogenic model, have received attention in the last...
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Robert Stein (Caltech)11/08/2022, 15:00
The Zwicky Transient Transient Facility (ZTF) performs a systematic neutrino follow-up program, searching for optical counterparts to high-energy neutrinos with dedicated Target-of-Opportunity observations. Since first light in March 2018, ZTF has taken prompt observations for 24 high-quality neutrino alerts from the IceCube Neutrino Observatory, with a median latency of 12.2 hours from...
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Jared Barron11/08/2022, 15:50Dark Matter
In the atomic dark matter scenario, a fraction of the dark matter can exist as a dark plasma of dark sector particles charged under their own gauge force, coupled to a dark radiation bath until a relatively late recombination. This process can leave observable imprints on the CMB and matter power spectrum of the universe, distinct from $\Lambda$CDM. We present an upgraded version of the...
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Lars Sivertsen (Iowa State University)11/08/2022, 15:50Particle Physics
Axions produced in the early universe can form bound clumps of Bose Einstein condensates, which are in some cases well described by a classical field with a single dominant angular frequency, close to the axion mass. In the vicinity of external electromagnetic fields, these axion clumps will start to radiate energy due to the axion-photon coupling. We will here consider the electromagnetic...
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Yu-Dai Tsai (University of California, Irvine)11/08/2022, 15:50Dark Matter
In this talk, we present model-independent constraints on dark matter and cosmic neutrinos through gravitational interactions on asteroidal objects. The bounds only rely on the matter density around the trajectories of the asteroids. The new bounds are model-independent but are most meaningful in constraining dark matter and cosmic neutrino scenarios with significant clustering.
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We also... -
Dr steven prohira (The Ohio State University)11/08/2022, 15:50
We present the current status of the Radar Echo Telescope, an instrument to detect neutrinos of the highest energies. First, we present the status of the Radar Echo Telescope for Cosmic Rays (RET-CR), a prototype instrument that seeks to test the radar echo method in nature, using the in-ice cascade produced by the core of a cosmic-ray air shower as it impacts the ice. We present the current...
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Takahiro Sudoh (Ohio State University)11/08/2022, 15:50
The high flux of hadronic cosmic rays and the detection of bright gamma-ray sources suggest a tight connection between them, which implies that Galactic neutrino sources must exist. However, none have been detected. Where are they? We outline constraints on the properties of hadronic PeVatrons based on the existing data. We introduce a new population-based approach, calibrated to the observed...
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Dylan Frikken11/08/2022, 16:10
The Radar Echo Telescope for Neutrinos (RET-N) is a proposed experiment to detect neutrinos with energies above ~10 PeV utilizing the radar echo method in polar ice. RET-N will consist of a phased-array radio transmitter and an array of receivers, aiming to detect the ionization trail from an ultra-high-energy neutrino interaction in-ice via active radar sounding. The received signal is a...
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Csaba Balazs11/08/2022, 16:10
I give an update on GAMBIT, the Global And Modular BSM Inference Tool. After briefly describing the main features of the GAMBIT code, I highlight why GAMBIT is a promising framework to isolate sign of physics beyond the standard models (BSM) of particle physics and cosmology. Then I show the latest GAMBIT results for a model where the gravitino, and the neutralinos and charginos are the only...
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Christopher Chang11/08/2022, 16:10Dark Matter
Dark matter candidates can arise from a wide range of extensions to the Standard Model. Simplified models with a small number of new particles allow for the optimisation and interpretation of dark matter and collider experiments, without the need for a UV-complete theory. In this talk, I will discuss the results from a recent GAMBIT study of global constraints on vector-mediated simplified...
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Wlodek Bednarek11/08/2022, 16:10
We investigate the hypothesis that hadrons are accelerated as a result of the reconnection of the White Dwarf magnetic field during the initial dense and fast wind in Nova explosion. Hadrons are expected to interact efficiently with a dense matter of the wind producing neutrinos with TeV energies. We estimate the muon neutrino event rates in the IceCube telescope in the case of a few Novae....
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Philip Von Doetinchem (University of Hawaii at Manoa)11/08/2022, 16:10
The GAPS experiment is designed to conduct a dark matter search by measuring low-energy cosmic-ray antinuclei (antiprotons, antideuterons, antihelium) with a novel detection approach. For the case of antiprotons, a high-statistics measurement in the unexplored low-energy range will be conducted. In contrast, not a single cosmic antideuteron has been detected by any experiment thus far....
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Yitian Sun11/08/2022, 16:30
Axions and axion-like particles (ALPs) are a theoretically promising dark matter candidate. In the presence of radio emissions from bright astrophysical sources, nonrelativistic ALPs can undergo stimulated decay to two nearly back-to-back photons, giving bright radio sources counterimages ("echoes") in nearly the exact opposite spatial direction. These echoes are spectrally distinct, and...
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Wafia Bensalem (Carleton University)11/08/2022, 16:30
Confining hidden sectors at the GeV scale are well motivated by asymmetric
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dark matter and naturalness considerations and can also give interesting collider signatures. Here we study such sectors connected to the Standard Model by a TeV scale mediator charged under both QCD and the dark force. Such a mediator admits a Yukawa
coupling between quarks and dark quarks which is generically... -
Julian Sitarek11/08/2022, 16:30
RS Ophiuchi (RS Oph) is a recurrent symbiotic nova. Its latest outburst, on 8th of August 2021, brought to the first detection of this class of sources in very-high-energy (above 100GeV) gamma rays. We present the MAGIC observations of RS Oph during this event, triggered by the Fermi-LAT detection of high energy gamma rays from this source. We characterize the emission from one day after the...
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Marco Muzio11/08/2022, 16:30
The Askaryan Radio Array (ARA) in Antarctica is designed to detect >10 PeV neutrinos through the radiation emitted by the particle showers they initiate. ARA consists of five stations each made up of 8 horizontally-polarized and 8 vertically-polarized antennas deployed on 4 strings in the Antarctic ice. These antennas detect the radio frequency pulses associated with Askaryan emission. An...
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Matheus Hostert (Perimeter Institute)11/08/2022, 16:30
Light dark sectors can explain the existence of dark matter and, if the new fermions carry lepton number, may also generate light neutrino masses. We revisit models where the dark photon $A^\prime$ couples to multiple generations of dark fermions. The decays $A^\prime$ are semi-visible: they contain visible particles but come accompanied by missing energy. We will show that these models can...
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Mr Yukiho Kobayashi (ICRR)11/08/2022, 16:50
The Cherenkov Telescope Array (CTA) will be the next-generation ground-based gamma-ray observatory, and will achieve unprecedented sensitivity in the energy range between 20 GeV and 300 TeV. The Large-Sized Telescopes (LSTs) provide the best sensitivity in the lowest part of the CTA energy range. The prototype LST (LST-1) for CTA was inaugurated in 2018, on La Palma, the northern site of CTA....
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Marco Taoso11/08/2022, 16:50
We consider a dark sector containing a pair of almost degenerate states coupled to the Standard Model via a portal interaction. The lightest state can be a dark matter candidate, while the heaviest one is long-lived, and its decays offer new testable signals at accelerator experiments. We study the prospects for the detection of this scenario at proposed LHC experiments (e.g. FASER and...
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Dr Valerio Vagelli (ASI and INFN-Perugia (IT)), Valerio Vagelli (Italian Space Agency (ASI) and INFN)11/08/2022, 16:50
Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 2.0 TeV based on 50 million electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. At medium energies, the electron flux exhibits a significant...
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Sam Eriksen11/08/2022, 17:10
The LUX-ZEPLIN (LZ) experiment is a direct dark matter detector hosted at the Sanford Underground Research Facility in Lead, South Dakota. LZ’s central detector is a dual-phase time projection chamber containing 7-tonnes of liquid xenon. This is aided by a xenon skin detector and a liquid scintillator-based outer detector to veto events inconsistent with dark matter.
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Results from LZ’s first... -
Prof. Annika Peter (Ohio State University)12/08/2022, 09:00Plenary Talk
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Prof. Cora Dvorkin12/08/2022, 09:30Plenary Talk
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Kristine Spekkens (RMC)12/08/2022, 10:30Plenary Talk
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Dennis Soldin12/08/2022, 11:00Plenary Talk
High-energy collisions at the High-Luminosity Large Hadron Collider (HL-LHC) will pro- duce an enormous flux of particles along the beam collision axis that is not accessible by existing LHC experiments. Multi-particle production in the far-forward region is of par- ticular interest for astroparticle physics. High-energy cosmic rays produce large particle cascades in the atmosphere, extensive...
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Chiara Mingarelli (U. Connecticut/Flatiron Institute)12/08/2022, 11:30Plenary Talk
Galaxy mergers are a standard aspect of galaxy formation and evolution, and most (likely all) large galaxies contain supermassive black holes. As part of the merging process, the supermassive black holes should in-spiral together and eventually merge, generating a background of gravitational radiation in the nanohertz to microhertz regime. An array of precisely timed pulsars spread across the...
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