Abstract
We studied the phenomenological implications of texture zeros in the neutrino mass matrix of the minimal left-right symmetric model (LRSM). Since the possibility of maximum zeros reduces the maximum number of free parameters of the model making it more predictive, we considered only those cases with maximum possible texture zeros in light neutrino mass matrix Mv , Dirac neutrino mass matrix MD and heavy right-handed (RH) neutrino mass matrix MRR . We then computed the correlations among the different light neutrino parameters and then the new physics contributions to neutrinoless double beta decay(NDBD) for the different texture zero cases. We find that for RH neutrino masses above 1 GeV, the new physics contributions to NDBD can saturate the corresponding experimental bound.
Highlights
Inspite of significant experimental observations in the neutrino sector in the last few decades, there are several unknowns like the absolute scale of neutrino mass, Dirac CP phase (δ), octant of atmospheric mixing angle and the ordering of light neutrino mass
We first find out the correlations among light neutrino parameters from the different texture zero conditions, some of which are shown in our paper, [7] and the new physics contribution to neutrinoless double beta decay (NDBD)
Neutrino mass in minimal left-right symmetric model We mainly focused on the simplest left-right symmetric model known as the minimal leftright symmetric model (MLRSM) which has been widely studied in literature
Summary
Inspite of significant experimental observations in the neutrino sector in the last few decades, there are several unknowns like the absolute scale of neutrino mass, Dirac CP phase (δ), octant of atmospheric mixing angle and the ordering of light neutrino mass. LRSM using discrete A4 group has been studied in [6], we see that using A4 in the framework of LRSM the relevant two zero textures in neutrino mass matrix could not be realized. It has already been shown in several earlier works that in the diagonal charged lepton basis, the light neutrino mass matrix should have at most two zeros.
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