Seesaw Dominance Effects for Neutrinoless Double Beta Decay in Left-Right Symmetric Lens

Abstract

Within Neutrino Physics, the Seesaw mechanism is an essential pillar known to all. Various Seesaw types make it an interesting phenomenon to include and verify its validity in several low-energy processes. Such low energy and LNV (∆L = 2) process is the neutrinoless double beta decay (0νββ). If the 0νββ decay process is being observed in the Left-right symmetric model, the effective mass of electron neutrino ( m eff ) would be a function of vR (vev of right-handed Higgs triplet) and Majorana phases (α and β). This vR is basically the high energy scale (Weinberg’s dim = 5 operators), which allows exploring new physics beyond the Standard model. The Left-right symmetric model generally includes Seesaw type-I and type-II mass terms as a hybrid mass for light neutrino and the percentage of type-I and II contributions (termed as dominance) differs for different solutions. We are studying different dominance patterns (2 n , n = 3(gen)) for the effective mass of (0νββ) decay with given experimental bounds (Kamland-Zen & GERDA).