M. K. Parida

Neutrino masses, dominant neutrinoless double beta decay, and observable lepton flavor violation in left-right models and SO(10) grand unification with low mass W R , Z R bosons

A bstractWhile the detection of WR-boson at the Large Hadron Collider is likely to resolve the mystery of parity violation in weak interaction, observation of neutrinoless double beta decay (0νββ) is expected to determine whether neutrinos are Majorana fermions. In this work we consider a class of LR models with TeV scale WR, ZR bosons but having parity restoration at high scales where they originate from well known Pati-Salam symmetry or SO(10) grand unified theory minimally extended to accommodate inverse seesaw frame work for neutrino masses. Most dominant new contribution to neutrinoless double beta decay is noted to occur via

Proton decay and new contribution to 0ν2β decay in SO(10) with low-mass Z′ boson, observable \( n-\overline{n} \) oscillation, lepton flavor violation, and rare kaon decay

W_L^{-}W_L^{-}

Standard coupling unification in SO(10), hybrid seesaw neutrino mass and leptogenesis, dark matter, and proton lifetime predictions

mediation involving lighter sterile neutrino exchanges. The next dominant contribution is found to be through

Singlet Fermion Assisted Dominant Seesaw with Lepton Flavor and Number Violations and Leptogenesis

W_L^{-}W_R^{-}

Low-mass right-handed gauge bosons from minimal grand unified theories

mediation involving both light and heavy right-handed neutrino or sterile neutrino exchanges. The quark-lepton symmetric origin of the computed value of the Dirac neutrino mass matrix is also found to play a crucial role in determining these and other results on lepton flavor violating branching ratios for τ → e + γ, τ → μ + γ, and μ → e + γ accessible to ongoing search experiments. The underlying non-unitarity matrix is found to manifest in substantial CP-violating effects even when the leptonic Dirac phase δCP ⋍ 0,π,2π. Finally we explore a possible origin of the model in non-supersymmetric SO(10) grand unified theory where, in addition to low mass

Neutrino Mass, Coupling Unification, Verifiable Proton Decay, Vacuum Stability, and WIMP Dark Matter in SU(5)

W_R^{\pm }

Inverse Seesaw Mechanism in Nonsupersymmetric SO(10), Proton Lifetime, Nonunitarity Effects, and a Low-mass Z' Boson

and ZR bosons accessible to Large Hadron Collider, the model is found to predict observable neutron-antineutron oscillation and lepto-quark gauge boson(mediated rare kaon decay with

New mechanism for Type-II seesaw dominance in SO(10) with low-mass

\mathrm{Br}\left( {{K_{\mathrm{L}}}\to \mu \overline{e}} \right)

Z^{\prime }

⋍ 10−9 − 10−11).

, RH neutrinos, and verifiable LFV, LNV and proton decay

A bstractIn the conventional approach to observable n−n¯