Dec 14 – 15, 2023
Centre for Particle Theory
Europe/London timezone

Primordial Black Holes & Leptogenesis

Dec 14, 2023, 4:30 PM
Ph8 (Centre for Particle Theory)


Centre for Particle Theory


Jacob Gunn (University of Naples Federico II)


Among mechanisms for generating the baryon asymmetry of the universe,
leptogenesis is attractive since it simultaneously explains the small
neutrino masses via the seesaw mechanism. Experiments offer some
valuable constraints, but the parameter space of even minimal
leptogenesis models are high-dimensional and difficult to probe
directly. However the parameter space of leptogenesis models can be
indirectly and severely constrained by populations of Primordial Black
Holes (PBHs). Also notoriously difficult to probe, PBHs may form via the
collapse of inflationary perturbations and inject particles and entropy
into the universe. PBHs can have masses as small as 1 gram, in this
limit they can evaporate completely so rapidly as to potentially affect
leptogenesis. In this talk I discuss how we can probe the parameter
spaces of PBHs via leptogenesis and vice versa. I also discuss recent
and ongoing works in the phenomenological consequences of hot-spots
around PBHs

Presentation materials