Impact of texture zeros of neutrino mass matrix on dark matter phenomenology
We study an inverse seesaw ISS (2, 3) framework to explain neutrino phenomenology and dark matter simultaneously with one zero textures of neutrino mass matrix. ISS (2, 3) is obtained by the addition of two right handed neutrinos and three gauge singlets sterile fermions to standard model. The model is more predictive because of presence of less number of right handed neutrinos than the conventional inverse seesaw. Moreover, texture zeros in the structures of the mass matrices reduce the free parameters. We extensively study the effect of different textures of neutrino mass matrix on sterile neutrino dark matter phenomenology. The zero textures highly constrain parameter space of the model. Based on the allowed cosmological ranges of the relic abundance, decay rates as well as the dark matter mixing with the active neutrinos, we verify the viability of the different one zero textures of the light neutrino mass matrix.
