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.

arXiv commentv2: 28 pages, matches the version to be published in European Physical Journal C

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• Light color octet scalars in the minimal SO(10) grand unification
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Cited by in corpus (18)

• Double Beta Decay, Lepton Flavour Violation and Collider Signatures of Left-Right Symmetric Models with Spontaneous D Parity Breaking
• Stringent Dilepton Bounds on Left-Right Models using LHC data
• Reconciling the 2 TeV Excesses at the LHC in a Linear Seesaw Left-Right Model
• Dilepton bounds on left-right symmetry at the LHC run II and neutrinoless double beta decay
• Multi-component Fermionic Dark Matter and IceCube PeV scale Neutrinos in Left-Right Model with Gauge Unification
• Implications of an Improved Neutron-Antineutron Oscillation Search for Baryogenesis: A Minimal Effective Theory Analysis
• 'Exotic vector-like pair' of color-triplet scalars
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• A comparative study of $0\nu \beta \beta$ decay in symmetric and asymmetric left-right model
• Common Origin of $3.55$ keV X-ray line and Gauge Coupling Unification with Left-Right Dark Matter
• Neutron-antineutron oscillations beyond the quasi-free limit
• Threshold effects on prediction for proton decay in non-supersymmetric $E_6$ GUT with intermediate trinification symmetry
• Connection between $\nu n\to \bar{\nu }\bar{n}$ reactions and $n$-$\bar{n}$ oscillations via additional Higgs triplets
• Neutron-neutral particle mixing and its observable consequences
• Dineutron decay into sterile anti-neutrinos in neutron stars and its observable consequences
• Effective Theory for Baryogenesis with a Majorana Fermion Pair Coupled to Quarks
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry
• $A_4$ realization of left-right symmetric linear seesaw