High-Energy Physics & RIKEN Theory Seminar

"Neutrinos from Primordial Black Holes, an opera in two acts"

Presented by Yuber Perez-Gonzalez, Fermilab & Northwestern

Thursday, March 11, 2021, 11:00 am — Videoconference / Virtual Event (see link below)

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.

Hosted by: Julia Gehrlein

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