Supersymmetric Model of Neutrino Mass and Leptogenesis with String-Scale Unification
Abstract
Adjoint supermultiplets (1,3,0) and (8,1,0) modify the evolution of gauge couplings. If the unification of gauge couplings occurs at the string scale, their masses are fixed at around GeV. This scale coincides with expected gaugino condensation scale in the hidden sector GeV. We show how neutrino masses arise in this unified model which naturally explain the present atmospheric and solar neutrino data. The out-of-equilibrium decay of the superfield (1,3,0) at GeV may also lead to a lepton asymmetry which then gets converted into the present observed baryon asymmetry of the Universe.
Keywords
Cite
@article{arxiv.hep-ph/0105278,
title = {Supersymmetric Model of Neutrino Mass and Leptogenesis with String-Scale Unification},
author = {Biswajoy Brahmachari and Ernest Ma and Utpal Sarkar},
journal= {arXiv preprint arXiv:hep-ph/0105278},
year = {2014}
}
Comments
Improved by including constraints imposed by gravitino decay, new references added, corrections and changes made. Accepted for publication in Physics Letters. B