Grand unification of fermion generations: Neutrino masses and cosmological constraints

Details Grand unification of fermion generations: Neutrino masses and cosmological constraints Grand unification of fermion generations: Neutrino masses and cosmological constraints

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..33.1777c&link_type=abstract

Physical Review D (Particles and Fields), Volume 33, Issue 6, 15 March 1986, pp.1777-1784

Mathematics

Logic

3

Unified Theories And Models Of Strong And Electroweak Interactions

Scientific paper

We discuss cosmological constraints on the mirror-symmetry-breaking scales in a recently proposed SO(18) model of family unification. We find two kinds of constraints: one based on considerations of cosmological baryogenesis restricts the scale of mirror-symmetry breaking to be close to the SO(18) unification scale; the second constraint needed to obtain a consistent picture of neutrino masses in this model requires an intermediate (B-L)-breaking scale below 106-107 GeV. We also show that constraints of grand unification require the breaking of the horizontal SO(8) scale to be above the scale of SO(10) symmetry.

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