Abstract
We study the new physics contributions to neutrinoless double beta decay (0νββ) in a TeV scale left-right model with spontaneous D-parity breaking mechanism where the values of the SU(2)L and SU(2)R gauge couplings, gL and gR are unequal. Neutrino mass is generated in the model via gauge extended inverse seesaw mechanism. We embed the model in a non-supersymmetric SO(10) GUT with a purpose of quantifying the results due to the condition gL≠gR. We compare the predicted numerical values of half life of 0νββ decay, effective Majorana mass parameter and other lepton number violating parameters for three different cases; (i) for manifest left-right symmetric model (gL=gR), (ii) for left-right model with spontaneous D parity breaking (gL≠gR), (iii) for Pati-Salam symmetry with D parity breaking (gL≠gR). We show how different contributions to 0νββ decay are suppressed or enhanced depending upon the values of the ratio gRgL that are predicted from successful gauge coupling unification.
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