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Toshihiro Fujii (Osaka Metropolitan University)8/26/24, 9:50 AM
Clarifying origins and acceleration mechanisms of the most energetic particles in the universe has been the 100-year endeavor, being one of the most intriguing mysteries in an interdisciplinary research among astroparticle physics, high-energy physics and nuclear physics. Since ultra-high energy cosmic rays (UHECRs) are deflected less strongly by the Galactic and extra-galactic magnetic fields...
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Regina Caputo (Nasa)8/26/24, 10:20 AM
For nearly 20 years, space based gamma-ray observations from the Fermi Gamma-ray Space Telescope and the Neil Gehrels Swift Observatory have revolutionized our understanding of the universe. They have revealed the explosive death of stars, the creation and evolution of black holes at all scales, and even our understanding of dark matter. However, this has also yielded many more questions....
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zhen cao (Institute of High Energy Physics)8/26/24, 11:30 AM
LHAASO keeps operating with high duty cycle and providing unique observations in gamma-ray sources and diffuse charged cosmic rays. Gamma-rays from the BOAT GRB, blazars, near-by AGNs and PeVatrons in our own galaxy are well detected. Physics associated with EBL, new physics searches, radiation mechanism of various sources are discussed. Particle acceleration in the galactic sources and...
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Scott Haselschwardt (University of Michigan)8/26/24, 12:00 PM
We present new results in the search for WIMP dark matter-induced nuclear recoils using a 4.2 tonne year exposure of the LZ experiment, which operates on the 4850’ level of the Sanford Underground Research Facility.
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Julian Munoz8/27/24, 9:00 AM
I will describe how the cosmic-dawn era, which saw the formation of the first galaxies, holds a wealth of information about dark matter and new physics in the early universe. The next decade will see detailed maps of this era with both 21-cm and space telescopes like the new James Webb. I will show how to use the upcoming data to measure dark-matter structure formation at smaller scales—and...
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Vera Gluscevic (USC)8/27/24, 9:30 AM
Cosmological observables, from the CMB anisotropy to the census of galaxies in the local universe, offer the most direct and broad tests for the nature of dark matter, including a number of scenarios that involve dark matter interactions, often challenging or even impossible to test in a laboratory setting. I will review the status of the recent early-universe and late-universe searches for...
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Mariangela Lisanti (Princeton University)8/27/24, 10:00 AM
The hypothesis of Cold Dark Matter (CDM) has been spectacularly confirmed on the largest scales of the Universe and must now be stress-tested on sub-galactic scales. Many well-motivated and generic alternatives to CDM can leave spectacular signatures on precisely these scales, affecting the evolution of galaxies as well as their population statistics. Excitingly, over the course of the next...
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Annika Peter (OSU)8/27/24, 11:10 AM
We are in an era of unprecedented volumes of astronomical data that can elucidate the nature and properties of dark matter—if we have predictions that are well-matched to the precision of the data sets. In this talk, I will highlight a sample of the triumphs and challenges in using simulations to predict cosmic phenomenal for different dark matter models.
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Manuel Meyer (University of Southern Denmark)8/27/24, 11:40 AM
The Cherenkov Telescope Array Observatory (CTAO) is the upcoming next-generation ground-based gamma-ray observatory. The CTAO will achieve superior sensitivity, angular, and spectral resolution over a broader energy range (tens of GeV to hundreds of TeV) compared to currently operating imaging air Cherenkov telescopes (IACTs). Full-sky coverage will be achieved with two IACT arrays in the...
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Matthew Szydagis (UAlbany SUNY)8/28/24, 9:00 AM
In this talk, I’ll discuss the status and prospects of direct searches for >1 GeV dark matter, which includes TeV-scale astrophysical particles!
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Chelsea Bartram (University of Washington)8/28/24, 9:30 AM
Decades of astrophysical observations point to the existence of a feebly interacting particle comprising 85% of the matter content of the universe. A promising candidate is the QCD axion, a natural product of the Peccei-Quinn mechanism that solves the strong CP problem. This talk will focus on the use of resonant haloscopes to search for axion dark matter, notably, the Axion Dark Matter...
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Noah Kurinsky (Stanford)8/28/24, 10:00 AM
I will discuss direct detection prospects for meV-GeV scale dark matter, including the SuperCDMS SNOLAB dark matter program, R&D towards meV-scale thresholds for scattering events, and new concepts in axion detection.
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Elisa Resconi (TUM)8/28/24, 11:00 AM
The detection of high-energy neutrinos by the IceCube Neutrino Observatory has opened a new window into the study of astrophysical sources, in particular Active Galactic Nuclei (AGN). Both jetted and non-jetted AGN are prime candidates for these neutrinos. This talk will review recent evidence linking specific AGN to IceCube neutrino events. I will show how multi-wavelength observations can be...
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Brian Clark (University of Maryland)8/28/24, 11:30 AM
Ultra-high energy neutrinos (>100 PeV) are expected to be unique messengers to the distant universe. This is because the other classic UHE messengers--photons and cosmic rays--are attenuated for sources further away than ~100 MPc. Additionally, as neutral and weakly interacting particles, neutrinos travel in straight lines, and so they point at their sources. However, the flux of UHE neutrinos...
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Ke Fang (University of Wisconsin-Madison)8/28/24, 12:00 PM
Over a decade after the discovery of diffuse astrophysical neutrinos, the first evidence of individual neutrino sources has emerged. These sources exhibit several distinct characteristics: 1) they are powerful and abundant; 2) they are likely opaque to the gamma rays that accompany neutrino production; and 3) extragalactic neutrino emitters are significantly more powerful than Galactic ones....
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Maya Fishbach (University of Toronto)8/29/24, 9:00 AM
The LIGO-Virgo-KAGRA Collaboration has observed ~100 gravitational-wave sources to date, including mergers between black holes, neutron stars, and mixed neutron star—black holes. These neutron stars and black holes connect many astrophysical puzzles, including the lives and deaths of stars, cosmic chemical enrichment, and the expansion history of the Universe. I will discuss some astrophysical...
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Kimberly Boddy (The University of Texas at Austin)8/29/24, 9:30 AM
Last year, multiple pulsar timing array collaborations across the globe announced the first evidence of a stochastic background of nHz-frequency gravitational waves. A population of inspiraling supermassive black hole binaries can generate a stochastic background, but there may also be contributions from exotic cosmological sources that formed around the time of the Big Bang. In this talk, I...
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Jessica Turner (Durham University)8/29/24, 10:00 AM
Primordial black holes, which could have potentially formed after inflation, can have significant implications for the early Universe's history. Such a population of black holes, which may have differing mass and spin, can undergo evaporation due to Hawking radiation at different points in time. In this talk, I will review the potential impact of this evaporation on various cosmological...
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Tracy Slayter (MIT)8/29/24, 11:10 AM
I will review current results in indirect searches for dark matter, outline the landscape of upcoming experiments, and survey some key scientific goals for indirect detection over the next decade. I will discuss case studies including prospects for theoretical and experimental advances in indirect searches for heavy WIMPs, and possible early-universe signatures of decaying dark matter.
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Nicholas Rodd (Lawrence Berkeley National Laboratory)8/29/24, 11:40 AM
This talk will review the status of the Galactic Center Excess (GCE). Discovered fifteen years ago in Fermi data, the GCE appears almost exactly as WIMP dark matter annihilations were predicted to emerge in gamma rays. Despite this and the fact that the excess is seen at high significance, its exact nature remains unclear. I will discuss the status of various aspects of the excess that could...
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Brian Metzger (Columbia)8/30/24, 9:00 AM
A small fraction of the stars in galactic nuclei migrate towards the central supermassive black hole (SMBH) via gravitational wave emission, arriving to small scales on low-eccentricity orbits ("extreme mass-ratio inspirals"; EMRIs). If a gaseous accretion disk suddenly forms around the SMBH during this gradual inspiral (e.g. by an independent tidal disruption event), then twice-per-orbit...
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Carmelo Evoli (Gran Sasso Science Institute)8/30/24, 9:30 AM
In recent years, the study of Galactic cosmic ray leptons has advanced significantly, largely due to measurements of absolute fluxes of positrons and electrons by AMS-02, and to the direct measurements of the total lepton flux above TeV energies by DAMPE and CALET. In this talk, we discuss how these results refine our models of cosmic ray propagation and contribute to resolving outstanding...
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Phil Bull (JBCA)8/30/24, 10:00 AM
The 21cm line from neutral hydrogen is a rare ubiquitous tracer of the cosmic matter distribution, from very high redshift until the present day. The future of large scale structure cosmology -- mapping out the abundance of modes during the cosmic dark ages -- largely depends on getting the 21cm mapping technique to work in other redshift regimes, which has so far proved rather challenging. In...
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Brian Batell (University of Pittsburgh)8/30/24, 11:10 AM
Accelerator experiments, both collider and fixed-target, play a pivotal role in probing the dark sector and uncovering the nature of dark matter. This talk will provide an overview of current efforts and future plans in utilizing accelerators to explore a wide range of dark matter candidates, from WIMPs to light dark sector particles. The synergy and complementarity between accelerator...
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Josh Ruderman (NYU)8/30/24, 11:40 AM
How was dark matter produced in the early Universe? There is a growing diversity of particle physics models for dark matter, which can be organized by different mechanisms for dark matter production. In this talk I will chart phase diagrams for thermal and nonthermal production of dark matter, highlighting recent developments.
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Gianfranco Bertone8/30/24, 12:10 PM
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Noemie Globus (UCSC)
I will review the important progress made in recent years towards understanding the origin of ultra-high-energy cosmic rays from a theoretical perspective.
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