Fakultät für Physik und Astronomie
STEPHEN PHILLIPS hostreviews.co.uk / UNSPLASH

Assessing the tension between a black hole dominated early universe and leptogenesis

Prof. Jessica Turner , Durham

Primordial black holes offer a unique method of particle production in the early Universe. If neutrinos are Majorana, heavy right-handed states like those appearing in the seesaw mechanism can be produced by a black hole, thus modifying the production of lepton asymmetry. In this talk, we will explore the non-trivial interplay between the black hole induced and thermal leptogenesis, demonstrating that for right-handed neutrino masses M > 10^12 GeV primordial black holes can open the leptogenesis parameter space while for smaller masses, black holes, in fact, deplete the baryon-to-photon ratio because of the reheating induced by the evaporation process.

Particle and Astroparticle Theory Seminar
6 Dec 2021, 16:30
Max-Planck-Institut für Kernphysik via Zoom

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