2016/10/07 by Gabriela Barenboim, Wan-Il Park
Physics and Astronomy · #Asymmetry #CP violation #Dark Matter and Cosmic Phenomena #Degeneracy (biology) #Dirac (video compression format) #Electron #Electron neutrino #Lepton #Lepton number #Massless particle #Muon #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1016/j.physletb.2016.12.043
7 pages, 7 figures
arxiv created 2016/10/07 · openalex publication_date 2016/12/22 · arxiv updated 2016/12/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 accessible neither in the current nor in the forthcoming experiments.