Quasi Goldstone Fermion As a Sterile Neutrino

Details Quasi Goldstone Fermion As a Sterile Neutrino Quasi Goldstone Fermion As a Sterile Neutrino

1995-07-21

arxiv.org/abs/hep-ph/9507371v1

Phys.Rev. D54 (1996) 4654-4661

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages plus 3 figures included

Scientific paper

10.1103/PhysRevD.54.4654

The existence of sterile neutrino is hinted by simultaneous explanation of diverse neutrino anomalies. We suggest that the quasi Goldstone fermions (QGF) arising in supersymmetric theory as a result of spontaneous breaking of global symmetry like the Peccei-Quinn symmetry or the lepton number symmetry can play a role of the sterile neutrino. The smallness of mass of QGF ($m_S \sim 10^{-3}-10$ eV) can be related to the specific choice of superpotential or K\"ahler potential (e.g., no-scale kinetic terms for certain superfields). Mixing of QGF with neutrinos implies the $R$-parity violation. It can proceed via the coupling of QGF with the Higgs supermultiplets or directly with the lepton doublet. A model which accounts for the solar and atmospheric anomalies and the dark matter is presented.

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