Eur. Phys. J. C (2014) 74: 3078
https://doi.org/10.1140/epjc/s10052-014-3078-x

Regular Article - Theoretical Physics

Post-sphaleron baryogenesis and – oscillation in non-SUSY SO(10) GUT with gauge coupling unification and proton decay

Center of Excellence in Theoretical and Mathematical Sciences, Siksha ‘O’ Anusandhan University, Bhubaneswar, 751030, India

^* e-mail: sudha.astro@gmail.com

Received: 30 May 2014
Accepted: 15 September 2014
Published online: 30 September 2014

Abstract

“Post-sphaleron baryogenesis”, a fresh and profound mechanism of baryogenesis accounts for the matter–antimatter asymmetry of our present universe in a framework of Pati–Salam symmetry. We attempt here to embed this mechanism in a non-SUSY SO(10) grand unified theory by reviving a novel symmetry breaking chain with Pati–Salam symmetry as an intermediate symmetry breaking step and as well to address post-sphaleron baryogenesis and neutron–antineutron oscillation in a rational manner. The Pati–Salam symmetry based on the gauge group is realized in our model at – GeV and the mixing time for the neutron–antineutron oscillation process having is found to be – s with the model parameters, which is within the reach of forthcoming experiments. Other novel features of the model include low scale right-handed , gauge bosons, explanation for neutrino oscillation data via the gauged inverse (or extended) seesaw mechanism and most importantly TeV scale color sextet scalar particles responsible for an observable – oscillation which may be accessible to LHC. We also look after gauge coupling unification and an estimation of the proton lifetime with and without the addition of color sextet scalars.