Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-04-27
Phys.Lett. B356 (1995) 273-281
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex file, 13 pages + 2 figures (included). The postscript file of text and figures is available at http://www.to.infn.it/
Scientific paper
10.1016/0370-2693(95)00767-F
We have analyzed the results of reactor and accelerator neutrino oscillation experiments in the framework of a general model with mixing of three neutrino fields and a neutrino mass hierarchy that can accommodate the results of the solar neutrino experiments. It is shown that $ \nu_\mu \leftrightarrows \nu_e $ oscillations with $ 0.6 \le \Delta m^2 \le 100 \, \mathrm{eV}^2 $ and amplitude larger than $ 2 \times 10^{-3} $ are not compatible with the existing limits on neutrino oscillations if the non-diagonal elements of the mixing matrix $ \left| U_{e3} \right| $ and $ \left| U_{\mu3} \right| $ are small. Thus, if the excess of electron events recently observed in the LSND experiment is due to $ \nu_\mu \leftrightarrows \nu_e $ oscillations, the mixing in the lepton sector is basically different from the CKM mixing of quarks. If this type of mixing is realized in nature, the observation of $ \nu_\mu \leftrightarrows \nu_e $ oscillations would not influence $ \nu_\mu \leftrightarrows \nu_\tau $ oscillations that are being searched for in the CHORUS and NOMAD experiments.
Bilenky Samoil M.
Bottino Alberto
Giunti Carlo
Kim Chung Wook
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