6533b822fe1ef96bd127d694
RESEARCH PRODUCT
Leptogenesis with small violation of B-L
Manuel PeñaNuria RiusJ. RackerJ. Rackersubject
PhysicsParticle physicsmedia_common.quotation_subjectDegenerate energy levelsHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaAstronomy and AstrophysicsContext (language use)Lepton numberAsymmetryHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Seesaw molecular geometryLeptogenesisGravitinoHigh Energy Physics::ExperimentNeutrinomedia_commondescription
We analyze leptogenesis in the context of seesaw models with almost conserved lepton number, focusing on the L-conserving contribution to the flavoured CP asymmetries. We find that, contrary to previous claims, successful leptogenesis is feasible for masses of the lightest heavy neutrino as low as M1 ~ 10^6 GeV, without resorting to the resonant enhancement of the CP asymmetry for strongly degenerate heavy neutrinos. This lower limit renders thermal leptogenesis compatible with the gravitino bound in supersymmetric scenarios.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-05-09 |