-- CANCELLED -- IFIC Seminar: Cosmic Matter-Antimatter Separation and Sterile Neutrino Dark Matter

by Prof. Mikhail Shaposhnikov (EPFL, Lausanne)

Tuesday 28 May 2024, 12:00 → 13:30 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

The lattice studies provided evidence of a smooth crossover between the hadronic and quark-gluon phases at high temperatures and zero chemical potential for baryonic number. We discuss a possibility that these simulations might not rule out relatively weak first-order phase transition. This first-order QCD phase transition may lead to cosmic separation of phases, creating temporarily macroscopic domains occupied by matter and antimatter. We demonstrate that this possibility may enhance the keV scale sterile neutrino production and can lead to its abundance consistent with the observable energy density of dark matter.

This IFIC Seminar has received funding/support from the Conselleria de Educación, Universidades y Empleo Research Project "Understanding non-perturbative Phenomena in fundamental physics" (PROMETEO/2021/083).