Four-Neutrino Oscillations

Details Four-Neutrino Oscillations Four-Neutrino Oscillations

1999-10-14

arxiv.org/abs/hep-ph/9910336v1

Nucl.Instrum.Meth.A451:51-57,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages. Talk presented at the ICFA/ECFA Workshop "Neutrino Factories based on Muon Storage Rings", nu-Fact'99, Lyon, France,

Scientific paper

10.1016/S0168-9002(00)00372-7

It is shown that at least four massive neutrinos are needed in order to accommodate the evidences in favor of neutrino oscillations found in solar and atmospheric neutrino experiments and in the LSND experiment. Among all four-neutrino schemes, only two, with a mass spectrum composed of two pairs of neutrinos with close masses separated by the "LSND gap" of the order of 1 eV, are compatible with the results of all neutrino oscillation experiments. In these two schemes the probability of nu_e transitions into other states, the probability of nu_mu->nu_e transitions and the size of CP violation effects in nu_mu->nu_e transitions are suppressed in long-baseline experiments.

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