TPPC weekly seminar: Andrew Cheek - "Primordial black hole evaporation and dark matter production"

Wednesday 21 Sep 2022, 12:30 → 14:00 Europe/London

Strand Building, S7.06

Speaker: Andrew Cheek, AstroCeNT, Polish Academy of Sciences

Title: Primordial black hole evaporation and dark matter production

Abstract:
Hawking evaporation of black holes is expected to copiously produce all kinds of particles, regardless of their charges. For primordial black holes (pbhs) of a certain mass and abundance, the implications for the early Universe can be huge, they can lead to early matter domination, produce gravitational wave signals and can even aid baryogenesis. In this talk I will discuss how future measurement of the CMB will provide constraints on black hole distributions, but to a much lesser extent than previously thought. Then I will discuss how hawking evaporation provides an efficient way of producing dark matter by way of gravity only. I will also discuss the interplay between pbh production and interacting dark matter. For these works I made use of the public code I co-developed called FRISBHEE, which solves the system of coupled Friedmann-Boltzmann equations. This talk will be based on Phys.Rev.D 105 (2022) 1, 015022, Phys.Rev.D 105 (2022) 1, 015023 and the preprint arXiv:2207.09462, as well as ongoing works.
 

 

Slides KCL_cheek.pdf