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Isomeric Lepton Mass Matrices and Bi-large Neutrino Mixing

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arxiv hep-ph/0403261 v1 pith:LPZE6YGG submitted 2004-03-25 hep-ph

Isomeric Lepton Mass Matrices and Bi-large Neutrino Mixing

classification hep-ph
keywords massneutrinoleptonmatricesdataexperimentalisomericlevel
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show that there exist six parallel textures of the charged lepton and neutrino mass matrices with six vanishing entries, whose phenomenological consequences are exactly the same. These {\it isomeric} lepton mass matrices are compatible with current experimental data at the $3\sigma$ level. If the seesaw mechanism and the Fukugita-Tanimoto-Yanagida hypothesis are taken into account, it will be possible to fit the experimental data at or below the $2\sigma$ level. In particular, the maximal atmospheric neutrino mixing can be reconciled with a strong neutrino mass hierarchy in the seesaw case.

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