Apr 29 2025

HEP-HEN Seminar- “Constraining the Coexistence of Freeze-in Dark Matter and Primordial Black Holes” with Sagnik Mukherjee (UIC)

Physics Seminar

April 29, 2025

11:00 AM - 11:00 AM

Location

SES 2214

Public Talk - Preliminary Exam
Title: Constraining the Coexistence of Freeze-in Dark Matter and Primordial Black Holes
Abstract: Particles beyond the Standard Model and primordial black holes (PBH) both provide candidates for explaining the observed dark matter density ΩDM. Moreover, both varieties may potentially coexist. Notably, large fractional abundances (up to 1% of ΩDM), are consistent with the limits on PBH for a wide range of PBH masses. Scenarios with significant populations of both particle dark matter and PBH are intriguing. If the particle dark matter has interactions with the Standard Model, new constraints can arise due to pair-annihilations that are enhanced by the PBHs, resulting in dark matter indirect detection constraints on the size of fPBH. Here we extend these considerations to consider scenarios with both PBH and freeze-in dark matter (“FIMPs”). We show that while the restrictions on fPBH are less constraining for FIMPs than for WIMPs, over much of model space bounds still exist. We also highlight that such PBH-FIMP scenarios could potentially be discovered in the next generation of indirect detection experiments.

Contact

Physics Office

Date posted

Mar 4, 2025

Date updated

Apr 23, 2025