Visible light exposure of galaxy cluster Abell 2744 from NASA/ESA Hubble Space Telescope and ESO's Very Large Telescope, X-ray data from NASA's Chandra X-ray Observatory & math reconstruction of dark matter location. D. Coe & J. Merten/ESO/NASA/ESA/CXC
Theory Seminar

Physics Theory Seminar with Yuhsin Tsai on Primordial Black Holes

Yuhsin Tsai (Hosted by Dev) from University of Notre Dame will be presenting the seminar "Insights from Detecting Gamma-Ray Signals of Primordial Black Holes"

Asteroid-mass primordial black holes (PBH) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBH can produce gamma-ray signals from measurements by the AMEGO and e-ASTROGAM experiments. In this talk, I will discuss two questions regarding the exciting possibility of seeing the PBH. Firstly, how can we confidently attribute an anomalous gamma-ray signal to PBHs, given their unknown mass spectrum and abundance? Secondly, if we do detect such signals, could we uncover any new physics associated with PBH radiation? To address these questions, I will examine the possible correlation between PBH's gamma-ray signals and the gravitational wave signals associated with their production. By combining both types of measurements, we can accurately determine the PBH parameters and confirm their existence. Additionally, I will examine the potential signal from axion-like particles (ALPs) produced by PBHs and discuss strategies for distinguishing the ALP signal from that of primordial PBH radiation.