Seminario

Sterile neutrinos in the early universe: Abstract. Recent cosmological data favor additional relativistic degrees of freedom beyond the three active neutrinos and photons. Light sterile neutrinos are prime candidates for such additional radiation. However, constraints on sterile neutrinos based on the current cosmological data have been derived assuming their thermalization at the Big Bang Nucleosynthesis (BBN) epoch. I'll discuss the evolution of light sterile neutrinos in the early universe, their role as dark radiation candidates and their thermalization just before BBN begins.

Persona di contatto:Dr. Eligio Lisi   This email address is being protected from spambots. You need JavaScript enabled to view it.

Telefono:080 5443223

Relatore:Dr.ssa Irene Tambora