Neutrino oscillations and signals in beta and 0nu2beta experiments

Details Neutrino oscillations and signals in beta and 0nu2beta experiments Neutrino oscillations and signals in beta and 0nu2beta experiments

2002-01-30

arxiv.org/abs/hep-ph/0201291v5

Nucl.Phys.B637:345-377,2002; Addendum-ibid.B659:359-362,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 12 figures. Version 2: footnote at page 21 added. Version 3: updated including SNO NC data. Version 4: addendum abou

Scientific paper

10.1016/S0550-3213(02)00345-0

Assuming Majorana neutrinos, we infer from oscillation data the expected values of the parameters m_{nu_e} and m_{ee} probed by beta and 0nu2beta-decay experiments. If neutrinos have a `normal hierarchy' we get the 90% CL ranges |m_{ee}| = (0.7 - 4.6) meV, and discuss in which cases future experiments can test this possibility. For `inverse hierarchy', we get |m_{ee}| = (12 - 57) meV and m_{\nu_e} = (40 - 57) meV. The 0nu2beta data imply that almost degenerate neutrinos are lighter than 1.05 h eV at 90% CL, competitive with the beta-decay bound. We critically reanalyse the data that were recently used to claim an evidence for 0nu2beta, and discuss their implications. Finally, we review the predictions of flavour models for m_{ee} and theta_{13}.

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