6533b7cefe1ef96bd12579ec
RESEARCH PRODUCT
Impact of CP-violation on neutrino lepton number asymmetries revisited
Wan-il ParkGabriela Barenboimsubject
Particle physicsNuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Physics::Instrumentation and Detectorsmedia_common.quotation_subjectFOS: Physical sciences01 natural sciencesAsymmetryNuclear physicsHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsNeutrino oscillationmedia_commonPhysicsMuon010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyLepton numberlcsh:QC1-999Massless particleHigh Energy Physics - PhenomenologyCP violationHigh Energy Physics::ExperimentNeutrinolcsh:PhysicsLeptonAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We revisit the effect of the (Dirac) CP-violating phase on neutrino lepton number asymmetries in both mass- and flavor-basis. We found that, even if there are sizable effects on muon- and tau-neutrino asymmetries, the effect on the asymmetry of electron-neutrinos is at most similar to the upper bound set by BBN for initial neutrino degeneracy parameters smaller than order unity. We also found that, for the asymmetries in mass-basis, the changes caused by CP-violation is of sub-\% level which is unlikely to be accesible neither in the current nor in the forthcoming experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-02-01 |