2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194067We introduce a dimension five CP violating coupling between the Ricci scalar and fermions. This operator splits the energy level between neutrinos and anti-neutrinos and can generate a lepton-asymmetry in the 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_ν\simeq 0.25 eV which is observable in double beta decay experiments.4 pages, no figuresAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext