Baryon asymmetry, neutrino mixing and supersymmetric SO(10) unification.

Details Baryon asymmetry, neutrino mixing and supersymmetric SO(10) unification. Baryon asymmetry, neutrino mixing and supersymmetric SO(10) unification.

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997banm.book.....p&link_type=abstract

Baryon asymmetry, neutrino mixing and supersymmetric SO(10) unification., by Plümacher, M.. DESY, Hamburg (Germany), Apr 1997,

Physics

Scientific paper

The baryon asymmetry of the universe can be explained by the out-of-equilibrium decays of heavy right-handed neutrinos. The author analyses this mechanism in the framework of a supersymmetric extension of the standard model and demonstrates the necessity to take into account lepton number violating scatterings which can wash-out an asymmetry and are nevertheless indispensable for baryogenesis. By assuming a similar pattern of mixings and masses for neutrinos and up-type quarks, as suggested by SO(10) unification, one can generate the observed baryon asymmetry without any fine tuning, if B-L is broken at the unification scale ΛGUT ≡ 1016GeV and, if mνμ ≡ 3·10-3eV as preferred by the MSW solution to the solar neutrino deficit.

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