We introduce a dimension five CP violating coupling between the Ricci scalar and fermions. This operator splits the energy level between neutrinos and antineutrinos and can generate a lepton asymmetry in the radiation era if heavy Majorana neutrinos decouple at the GUT scale. This operator can also generate a lepton asymmetry during warm inflation if the light neutrinos have a Majorana mass m(v) greater than or similar to 0.25 eV which is observable in double beta decay experiments.
Gravitational Leptogenesis
LAMBIASE, Gaetano;
2007-01-01
Abstract
We introduce a dimension five CP violating coupling between the Ricci scalar and fermions. This operator splits the energy level between neutrinos and antineutrinos and can generate a lepton asymmetry in the radiation era if heavy Majorana neutrinos decouple at the GUT scale. This operator can also generate a lepton asymmetry during warm inflation if the light neutrinos have a Majorana mass m(v) greater than or similar to 0.25 eV which is observable in double beta decay experiments.File in questo prodotto:
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