SEMINARIO DI FISICA ASTROPARTICELLARE

Leptogenesis and Quintessential Kination

Stefano Scopel
(Korea Institute for Advanced Study, Seoul)

Abstract
We show how thermal leptogenesis induced by the CP-violating decay of a right-handed neutrino (RHN) can be compatible to the assumption of quintessential kination, i.e., to a cosmological background model where the energy density of the early Universe is assumed to be dominated by the kinetic term of a quintessence field during some epoch of its evolution. The phenomenology depends on the temperature T_r above which kination dominates over radiation. We show that for some choice of T_r not far from the RHN mass M, M/100 5 MeV (M/TeV) (0.05 eV/m) must be verified, with m the effective neutrino mass scale.

Wednesday, 19 December 2007, at 14:30, Aula Wick



Carlo Giunti / giunti@to.infn.it
Last update: Wed 19 Dec 2007, 12:46:01 UTC