Phys. Rev. D 59, 097702 (1999) [4 pages]Minimal seesaw model for atmospheric and solar neutrino oscillationsReceived 1 December 1998; published 6 April 1999 We present a minimal seesaw model based on an extension of the standard model (SM) which includes an additional U(1), with gauge charge B-3/2(Lμ+Lτ). The requirement of anomaly cancellation implies the existence of two right-handed singlet neutrinos, carrying this gauge charge, which have normal Dirac couplings to νμ and ντ but suppressed ones to νe. Assuming the U(1) symmetry breaking scale to be 1012-1016 GeV, this model can naturally account for the large (small) mixing solutions to the atmospheric (solar) neutrino oscillations. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.59.097702
DOI:
10.1103/PhysRevD.59.097702
PACS:
12.60.Cn, 12.15.Ff, 14.60.Pq
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