Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-04-05
Phys.Lett. B536 (2002) 94-100
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, latex, no figures
Scientific paper
10.1016/S0370-2693(02)01826-9
We show that in the minimal three generation seesaw models for neutrinos, the presence of leptonic $(L_e+L_{\mu}-L_{\tau})\times S_2$ symmetry leads to one of the right handed neutrinos remaining massless. This state can then be identified with the sterile neutrino required for a simultaneous understanding of solar, atmospheric and LSND observations. We present a gauge model where the presence of higher dimensional operators originating from Planck scale physics lead to a realistic 2+2 mixed scenario that fits all oscillation data. The model predicts a range for the mixing angle $U_{e3}$ and an effective mass for neutrinos emitted in tritium decay, which can be used to test this model.
Brahmachari Biswajoy
Choubey Sandhya
Mohapatra Rabindra N.
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