title: Leptogenesis from spin-gravity coupling following inflation.
abstract: The energy levels of the left- and the right-handed neutrinos are split in the background of gravitational waves generated during inflation, which, in presence of lepton-number-violating interactions, gives rise to a net lepton asymmetry at equilibrium. Lepton number violation is achieved by the same dimension five operator which gives rise to neutrino masses after electroweak symmetry breaking. A net baryon asymmetry of the same magnitude can be generated from this lepton asymmetry by electroweak sphaleron processes.
authors.affiliation: Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India.
authors.forename: Subhendra
authors.initials: S
authors.lastname: Mohanty
authors.forename: A R
authors.initials: AR
authors.lastname: Prasanna
authors.forename: G
authors.initials: G
authors.lastname: Lambiase