21–24 Sept 2021
DESY Hamburg
Europe/Berlin timezone

Absorption from Primordial Black Holes as source of baryon asymmetry

24 Sept 2021, 09:35
15m
Main Auditorium

Main Auditorium

Cosmology & Astroparticle Physics Parallel Sessions: Cosmology

Speaker

Damiano F. G. Fiorillo (University of Naples "Federico II")

Description

We propose a new mechanism for baryogenesis, in which baryon asymmetry is generated by absorption of a new particle $X$ carrying baryon number onto Primordial Black Holes (PBHs). Due to CP violation of $X$ and $\overline{X}$ scattering with the plasma surrounding PBHs, the two conjugate particles are differently absorbed by PBHs, leading to the production of an asymmetry in the $X$ sector. The production is halted by PBH evaporation, after which the asymmetry is transferred into the baryonic sector via $X$ decay. We show that this mechanism can produce the correct amount of asymmetry without violating the known constraints on PBHs concentration. Furthermore, we provide a systematic study of the parameter space, identifying the regions leading to the production of the correct baryon asymmetry

Do you wish to attend the workshop on-site? no

Primary author

Damiano F. G. Fiorillo (University of Naples "Federico II")

Co-authors

Antonio Ambrosone (University of Naples "Federico II") Roberta Calabrese (University of Naples "Federico II") Gennaro Miele (University of Naples "Federico II") Stefano Morisi (University of Naples "Federico II")

Presentation materials