Light Unstable Sterile Neutrino

Details Light Unstable Sterile Neutrino Light Unstable Sterile Neutrino

2001-07-18

arxiv.org/abs/hep-ph/0107203v2

Phys.Rev. D64 (2001) 117303

Physics

High Energy Physics

High Energy Physics - Phenomenology

Discussion and references added

Scientific paper

10.1103/PhysRevD.64.117303

The three massless active (doublet) neutrinos may mix with two heavy and one \underline {light} sterile (singlet) neutrinos so that the induced masses and mixings among the former are able to explain the present data on atmospheric and solar neutrino oscillations. If the LSND result is also to be explained, one active neutrino mass eigenstate must mix with the light sterile neutrino. A specific model is proposed with the spontaneous and soft explicit breaking of a new global $U(1)_S$ symmetry so that a sterile neutrino will decay into an active antineutrino and a nearly massless pseudo-Majoron.

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