Leptogenesis via hidden sector: unifying the visible and dark matters

por Prof. Zurab Berezhiani (Univ. L'Aquila & LNGS)

martes 26 nov. 2002 16:00 → 17:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

We propose a mechanism in which baryon asymmetry of the universe is produced by out-of-equilibrium B-L and CP violating scattering processes that transform ordinary particles into particles of the hidden mirror sector. In the context of seesaw picture these processes can be mediated by the heavy "right-handed" neutrinos. The same mechanism produces a somewhat large baryon asymmetry also in the mirror sector particles and thus the latter could provide a natural candidate for dark matter. Phenomenological and astrophysical implications of such a scenario is discussed.