title: CP violation in neutrino oscillation and leptogenesis.
abstract: We study the correlation between CP violation in neutrino oscillations and leptogenesis in the framework with two heavy Majorana neutrinos and three light neutrinos. Among three unremovable CP phases, a heavy Majorana phase contributes to leptogenesis. We show how the heavy Majorana phase contributes to Jarlskog determinant J as well as neutrinoless double beta decay by identifying a low energy CP-violating phase which signals the CP-violating phase for leptogenesis. For some specific cases of the Dirac mass term of neutrinos, a direct relation between lepton number asymmetry and J is obtained. We also study the effect coming from the phases which are not related to leptogenesis.
authors.affiliation: Graduate School of Science, Hiroshima University, Higashi Hiroshima 739-8526, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Endoh
authors.forename: S
authors.initials: S
authors.lastname: Kaneko
authors.forename: S K
authors.initials: SK
authors.lastname: Kang
authors.forename: T
authors.initials: T
authors.lastname: Morozumi
authors.forename: M
authors.initials: M
authors.lastname: Tanimoto