Exploring Alternative Left-Right Model: 0νββ decay, Leptogenesis, and Dark matter

Left-Right (LR) theories are one of the successful beyond Standard Model scenarios to provide a unified explanation to the origin of small neutrino masses and low-energy parity violation. However, conventional LR theory faces challenges due to Flavor Changing Neutral Currents (FCNCs). We have explored an Alternative LR model (ALRM) that avoids FCNC constraints and introduces new physics signatures in 0νββ decay and leptogenesis. We have shown that the new type of vector-scalar diagram contributes significantly in 0νββ decay, and a small Dirac CP-phase in the right-handed neutrino sector can saturate current BAU bound. Moreover, our analysis ensures scalar potential stability and provides criteria for charge-preserving vacua. The model also predicts dark matter candidates stabilised by an R-parity, similar to supersymmetry.