Sterile neutrino in a minimal three-generation see-saw model |
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| Authors: | Biswajoy Brahmachari Sandhya Choubey Rabindra N Mohapatra |
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| Institution: | (1) Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, 700 064 Kolkata, India;(2) Department of Physics and Astronomy, University of Southampton, SO17 1RJ Highfield, Southampton, UK;(3) Department of Physics and Astronomy, University of Maryland, 20742 College Park, MD, USA;(4) Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34100 Trieste, Italy |
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| Abstract: | We investigate symmetries in Dirac and Majorana mass matrices of neutrinos in a three-generation scenario. We show that if
we invokeL
e +L
μ-L
τ
x
S
2R symmetry, one combination of right-handed neutrino states remains massless which can be interpreted as a sterile neutrino.
Next we consider a SU2L
x U(1)y
x U(l)R gauge model and show how higher-dimensional operators can induce mixing between left- and right-handed states which explains
solar, atmospheric and LSND experimental results. |
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| Keywords: | Sterile neutrino LSND |
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