CP-phase effects on the effective neutrino mass $m_{ee}$ in the case of quasi-degenerate neutrinos

Details CP-phase effects on the effective neutrino mass $m_{ee}$ in the case of quasi-degenerate neutrinos CP-phase effects on the effective neutrino mass $m_{ee}$ in the case of quasi-degenerate neutrinos

2009-12-23

arxiv.org/abs/0912.4628v2

Phys.Rev.D81:037301,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 figure

Scientific paper

10.1103/PhysRevD.81.037301

We study the possibility that the three mass states of the ordinary active neutrinos actually split into pairs of quasi-degenerate states, with $\Delta m^2_{kk'} \sim 10^{-12}$ eV$^2$ or less, as a result of mixing of active neutrinos with sterile neutrinos. Although these quasi-degenerate pairs will look in laboratory experiment identical to single active states, the CP phase factors associated with active-sterile mixing might cause cancellations in the effective electron neutrino mass $m_{ee}$ measured in the neutrinoless double beta decay experiments thereby revealing the split nature of states.

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