Post-Sphaleron baryogenesis and $n-\bar{n}$ oscillation in non-SUSY SO(10) GUT with gauge coupling unification and proton decay

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 $SU(2{)}_L\times SU(2{)}_R\times SU(4{)}_C$ is realized in our model at $10^5-10^6$ GeV and the mixing time for the neutron-antineutron oscillation process having $\Delta B=2$ is found to be $τ_{n-\bar{n}} \simeq 10^{8}-10^{10}\,\mbox{secs}$ with the model parameters which is within the reach of forthcoming experiments. Other novel features of the model includes low scale right-handed $W_R^{\pm }$, $Z_R$ gauge bosons, explanation for neutrino oscillation data via gauged inverse (or extended) seesaw mechanism and most importantly TeV scale color sextet scalar particles responsible for observable $n-\bar{n}$ oscillation which can be accessible to LHC. We also look after gauge coupling unification and estimation of proton life-time with and without the addition of color sextet scalars.

v2: 28 pages, matches the version to be published in European Physical Journal C

References in corpus (5)

• Leptogenesis
• Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Post--Sphaleron Baryogenesis
• Search for Nucleon Decay into Charged Anti-lepton plus Meson in Super-Kamiokande I and II
• Search for heavy neutrinos and W[R] bosons with right-handed couplings in a left-right symmetric model in pp collisions at sqrt(s) = 7 TeV

Cited by in corpus (6)

• Double Beta Decay, Lepton Flavour Violation and Collider Signatures of Left-Right Symmetric Models with Spontaneous D Parity Breaking
• 'Exotic vector-like pair' of color-triplet scalars
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• Neutron-antineutron oscillations beyond the quasi-free limit
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry
• $A_4$ realization of left-right symmetric linear seesaw