[W115] Yuber F Perez-Gonzalez: “Neutrinos from Primordial Black Holes, an opera in two acts”

Neutrinos from Primordial Black Holes, an opera in two acts

Wednesday 16 June 2021 – 15:00 UTC

Speaker

Yuber F Perez-Gonzalez
Fermilab & Northwestern University
USA

Host

Nicolás Bernal
Universidad Antonio Nariño

Abstract

Hawking radiation offers a unique method of neutrino production, unlike any weak interaction process. Moreover, black hole evaporation depends on whether neutrinos are Dirac or Majorana, providing a different phenomenology in each case. If neutrinos are Dirac particles, the emission of the light right-handed states does not suffer from the helicity suppression present in weak interactions. Hence, it is possible to have a significant fraction of such states as relics from the Early Universe. On the other hand, if neutrinos are Majorana, heavy right-handed states like those appearing in the seesaw mechanism can be produced by a black hole, altering thermal leptogenesis and thus the baryon asymmetry. In this talk, we will explore these two different possibilities.

References

https://arxiv.org/abs/1910.07864

https://arxiv.org/abs/2010.03565

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