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Hooman Davoudiasl11/05/2026, 16:30
It has recently been proposed that the Standard Model may include
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an ultralight pseudo-scalar, ηw, emerging from electroweak interactions. We find that typical expectations for the properties of ηw get challenged by astrophysical constraints on the couplings of ultralight bosons. -
Vedran Brdar (Oklahoma State University (US))11/05/2026, 16:45
Axion-like particles (ALPs) appear in many beyond-the-Standard-Model theories, either as candidates for dark matter or as partners of the axion that explains the apparent conservation of charge-parity symmetry, known as the strong CP problem. In this talk, I will present a novel method for probing ALPs using eclipsing binary systems which can serve as an astrophysical realization of...
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Shirley Li (UC Irvine)11/05/2026, 17:00
Isolated neutron stars (INS) are the simplest kinds of neutron stars, but only seven have been discovered and confirmed. We show that in the near future, the Vera Rubin Observatory (VRO) will be able to identify new INS candidates. In this talk, we outline a proof of concept for predicting the signals from INS as seen by VRO, as well as a method for separating those signals from backgrounds....
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Eric Putney (Rutgers University)11/05/2026, 17:15
The Galactic Center GeV excess is one of the most promising indirect detections of dark matter, but robust interpretation of the signal is bottlenecked by the cost of simulating the cosmic-ray-induced $\gamma$-ray background. It is intractable to run the gold-standard GALPROP code over the full space of plausible propagation models, whose cosmic-ray distributions are highly uncertain and...
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310. Constraining Galactic Cosmic Ray Models with a Multi-Messenger Analysis of the Diffuse EmissionAlisha Roberts (University of Wisconsin-Madison)11/05/2026, 17:30
The origin of Galactic Cosmic Rays (GCRs) up to the PeV energy scales remains a significant question in astrophysics. As charged particles, GCRs are deflected by galactic magnetic fields, obscuring their sources. However, the interactions of GCRs with interstellar gas produce a diffuse flux of high-energy gamma rays and neutrinos. This talk will investigate the origins of GCRs by performing a...
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Yuvaraj Elangovan (University of Pittsburgh (US))11/05/2026, 17:45
We present Mini Cosmic Ray Tracker Experiment (Mini-CoRTEx), a portable plastic scintillator-based detector designed for three-dimensional tracking and real-time visualization of cosmic-ray muons. The system consists of eighteen plastic scintillator tiles, each instrumented with wavelength-shifting fibers and silicon photomultipliers, arranged in three stacked layers with orthogonal x-y...
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SUHAIL KHAN (Centre for Theoretical Physics,Jamia Millia Islamia, New Delhi, India)11/05/2026, 18:00
If sneutrinos are produced through primordial black hole (PBH) evaporation, then some interesting features of soft leptogenesis in the Minimal Supersymmetric Standard Model with heavy right-handed neutrinos, are found. The required baryonic asymmetry could be possible from the decays of sneutrinos, for the soft SUSY breaking trilinear $A$ and bilinear $B$ parameters around the electroweak...
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Jiawei (Vivian) Gao (UCSB)11/05/2026, 18:15
Magnetic monopoles are well known to catalyze baryon number violating processes in grand unified theories through the Callan–Rubakov effect. More generally, however, monopoles participating in the electroweak anomaly can catalyze processes with ΔB=ΔL=3. In this talk, I will present a first phenomenological exploration of such monopole-induced processes in different physical settings. I will...
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Walter Tangarife (Loyola University Chicago)12/05/2026, 16:30
his talk will address the impact of heavy dark matter (DM) captured in massive stars via scattering(s) with the star constituents. We focus on the first stars and use stellar evolution simulations to track down how DM capture evolves over time from the zero-age main sequence to the late metal-rich stages of stellar evolution. During the early hydrogen-helium-dominated phase, the capture...
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Mr Partha Kumar Paul (Indian Institute of Technology Hyderabad)12/05/2026, 16:45
We propose a simple yet testable framework for light fermion dark matter (DM) with mass in the MeV--GeV range, charged under a dark $U(1)_D$ gauge symmetry. The $U(1)_D$ is spontaneously broken by a scalar field $\Phi$, giving mass to the dark gauge boson $X_D$. The dominant DM annihilation proceeds via a forbidden channel, where the DM pair annihilates into slightly heavier dark gauge bosons...
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Jackie Lodman (Harvard University)12/05/2026, 17:00
One of the major scientific milestones of the Gaia mission has been the achievement of an improved stellar binary population census and the discovery of rare objects such as black hole (BH)-star binaries. High precision astrometric measurements of binary separations and mass ratios have an application in dark sector physics, as stellar binaries are highly sensitive to the spatial as well as...
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M. Grant Roberts (University of California, Santa Cruz)12/05/2026, 17:15
With the advent of the James Webb Space Telescope (JWST), observational probes of the structure of objects in the early universe are more readily available. In particular, the discovery of high-redshift (z ~ 10) Supermassive Black Holes (SMBHs) challenges the typical formation channels of these objects which cannot form sufficiently massive seeds or grow them within these timescales without...
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Carlos Ramos Portalatino (University of Florida)12/05/2026, 17:30
Ultralight Dark Matter (ULDM) is a compelling alternative to the WIMP paradigm, offering potential solutions to small-scale structure challenges through its wave-like behavior. A hallmark of ULDM is the presence of interference-induced overdensities, or "Extended Dark Objects" (EDOs), which arise naturally within the dark matter halo. In this talk, we present a method to constrain the ULDM...
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Souradeep Das (Ohio State University)12/05/2026, 17:45
The James Webb Space Telescope (JWST) has discovered numerous bright galaxies at high redshifts ($z\approx 10-14$). Many astrophysical models and beyond the Standard Model physics scenarios have been proposed to explain these observations. We investigate, for the first time, the implications of dark matter (DM) scattering with baryons (protons and electrons) in light of the JWST UV...
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Yu Cheng12/05/2026, 18:00
We propose a novel strategy to probe feebly-interacting particles (FIPs) by exploiting the dense, confined circumstellar medium (CSM) surrounding core-collapse supernovae (CCSNe). FIPs produced in the proto-neutron star can deposit substantial visible energy into the CSM via decay prior to the shock breakout from the progenitor star. This energy injection heats and ionizes the CSM,...
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Joshua Bautista (University of Virginia)12/05/2026, 18:15
Very high energy electrons initiate electromagnetic showers in ordinary matter that branch and multiply through bremsstrahlung and pair production. At extremely high energies, the quantum mechanical duration of these processes becomes longer than the mean free time to elastically scatter from the medium, which leads to a very significant suppression of bremsstrahlung (and pair production)...
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