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DOUBLE THREEFOLD DEGENERACIES FOR ACTIVE AND STERILE NEUTRINOS
2001
Modern Physics Letters A
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We explore the possibility that the 3 active (doublet) neutrinos have nearly degenerate masses which are split only by the usual seesaw mechanism from 3 sterile (singlet) neutrinos in the presence of a softly broken A_4 symmetry. We take the unconventional view that the sterile neutrinos may be light, i.e. less than 1 keV, and discuss some very interesting and novel phenomenology, including a connection between the LSND neutrino data and solar neutrino oscillations.
doi:10.1142/s0217732301005679
fatcat:voi2ikyeofftnhh5redw5ewo7i