L/E-flatness of the electron-like event ratio, in Super-Kamiokande and a degeneracy, in neutrino masses
Abstract
We show that the L/E-flatness of the electron-like event ratio in the Super-Kamiokande atmospheric neutrino data implies the equality of the expectation values for the muon and tau neutrino masses. We establish this result by obtaining a set of three constraints on the neutrino-oscillation mixing matrix as contained in the indicated flatness. The resulting 3x3 neutrino-oscillation matrix depends only on one angle. A remarkable result that follows directly from this matrix is the consistency between the mixing angles observed by LSND and Super-Kamiokande.
- Publication:
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Physics Letters B
- Pub Date:
- August 1999
- DOI:
- 10.1016/S0370-2693(99)00811-4
- arXiv:
- arXiv:hep-ph/9903408
- Bibcode:
- 1999PhLB..460..431S
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- Journal version