Theoretical Prospects of Neutrinoless Double Beta Decay

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The compelling experimental evidences for oscillations of solar and atmospheric neutrinos imply the existence of 3-neutrino mixing in vacuum. We briefly review the phenomenology of 3-v mixing, and the current data on the 3-neutrino mixing parameters. The open questions and the main goals of future research in the field of neutrino mixing and oscillations are outlined. The predictions for the effective Majorana mass |<m>| in (betabeta)0v-decay in the case of 3-v mixing and massive Majorana neutrinos are reviewed. The physics potential of the experiments, searching for (betabeta)0v-decay and having sensitivity to |<m>| >~ 0.01 eV, for providing information on the type of the neutrino mass spectrum, on the absolute scale of neutrino masses and on the Majorana CP-violation phases in the PMNS neutrino mixing matrix, is discussed.

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Phys. Scr. T121 (2005) 94-101

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