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arXiv · 1610.02335

Impact of CP-violation on neutrino lepton number asymmetries revisited

Gabriela Barenboim·Wan-Il Park
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Abstract

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.

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Gabriela Barenboim, Wan-Il Park. 2016-10-07. Impact of CP-violation on neutrino lepton number asymmetries revisited. https://doi.org/10.1016/j.physletb.2016.12.043

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