Model of Four Light Neutrinos in the Light of All Present Data

Details Model of Four Light Neutrinos in the Light of All Present Data Model of Four Light Neutrinos in the Light of All Present Data

1995-04-19

arxiv.org/abs/hep-ph/9504342v2

Phys.Rev.D52:4780-4783,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

Title changed, new (penultimate) paragraph added, Ref.[7] expanded, 12 pages, no figure

Scientific paper

10.1103/PhysRevD.52.R4780

Motivated by existing and recent data on possible neutrino oscillations, we propose a model of four light neutrinos ($\nu_e, \nu_\mu, \nu_\tau$, and a singlet $\nu_S$) with a pattern of masses and mixing derivable from a $Z_5$ discrete symmetry and the seesaw mechanism. Atmospheric neutrino oscillations occur between $\nu_\mu$ and $\nu_\tau$ as pseudo-Dirac partners; whereas solar neutrino oscillations occur between $\nu_e$ and $\nu_S$, a linear combination of which is massless. Additional oscillations may occur between $\nu_e$ and $\nu_\mu$ to account for the recent observation of the LSND (Liquid Scintillator Neutrino Detector) experiment.

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