δT/T, Neutrino Oscillations And Proton Decay

Details δT/T, Neutrino Oscillations And Proton Decay δT/T, Neutrino Oscillations And Proton Decay

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..805...10s&link_type=abstract

PARTICLES, STRINGS, AND COSMOLOGY: 11th International Symposium on Particles, Strings, and Cosmology; PASCOS 2005. AIP Conferen

Physics

Particle-Theory And Field-Theory Models Of The Early Universe, Supersymmetric Models, Neutrino Mass And Mixing, Decays Of Baryons

Scientific paper

A gauged U(1)B-L symmetry predicts three right handed handed neutrinos and its spontaneous breaking automatically yields the seesaw mechanism. In a supersymmetric setting this breaking can be nicely linked with inflation to yield δT/T proportional to (MB-L/MP)2, where MB-L (MP) denote the B - L breaking (Planck) scale respectively. Thus MB-L is estimated to be of order 1016 GeV, and the heaviest right handed neutrino mass is of order 1014 GeV. A second right handed neutrino turns out to have a mass of order 10 - 102 Tr, where Tr (<~ 1010 GeV) denotes the reheat temperature. A U(1) R symmetry plays an essential role in implementing inflation and leptogenesis, resolving the MSSM μ problem and eliminationg dimension five nucleon decay. An unbroken Z2 subgroup plays the role of matter parity. Extension to SO(10) is possible and implications for proton decay are briefly discussed.

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