The Impact of Non-zero \theta_{13} on Neutrino Mass and Leptogenesis in a SUSY SO(10) Model

TL;DR

This paper investigates how recent measurements of a non-zero neutrino mixing angle 13 impact neutrino mass models and leptogenesis within a supersymmetric SO(10) framework, proposing an extended model with testable predictions.

Contribution

It introduces an extended supersymmetric SO(10) model with an extra fermion singlet to reconcile neutrino data and leptogenesis constraints.

Findings

The model accommodates recent neutrino oscillation data.

It predicts TeV-scale doubly-charged Higgs scalars detectable at LHC.

The model successfully generates the observed lepton asymmetry.

Abstract

The recent measurement of the reactor angle as $\sin^2 2\theta_{13} = 0.092 \pm 0.016(stat) \pm 0.005(syst)$ come from the Daya Bay collaboration. Evidence of nonzero \theta_{13} was also there at T2K, MINOS and Double Chooz experiments. We study the implication of these recent data on neutrino mass matrix and consequently on leptogenesis in a supersymmetric SO(10) model. To explain the smallness of neutrino mass, in general, we require a heavy Majorana neutrino which is a natural candidate in SO(10) model. In minimal SO(10) model, the symmetry breaking scale or the right-handed neutrino mass scale is close to the GUT scale. It is not only beyond the reach of any present or future collider search but the lepton asymmetry generated from its decay is in conflict with the gravitino constraint as well as unable to fit the neutrino data. We show that addition of an extra fermion singlet can accommodate the observed recent neutrino data in a supersymmetric SO(10) model. This model can generate the desired lepton asymmetry and provide TeV scale doubly-charged Higgs scalars to be detected at LHC.