Generalized ℤ₂×ℤ₂ in scaling neutrino Majorana mass matrix and baryogenesis via flavored leptogenesis

We investigate the consequences of a generalized ℤ₂×ℤ₂ symmetry on a scaling neutrino Majorana mass matrix. It enables us to determine definite analytical relations between the mixing angles θ₁₂ and θ₁₃, maximal CP violation for the Dirac type and vanishing for the Majorana type. Beside the other testable predictions on the low energy neutrino parameters such as ββ_0ν decay matrix element |M_ee| and the light neutrino masses m_1,2,3, the model also has intriguing consequences from the perspective of leptogenesis. With the assumption that the required CP violation for leptogenesis is created by the decay of lightest (N₁) of the heavy Majorana neutrinos, only τ-flavored leptogenesis scenario is found to be allowed in this model. For a normal (inverted) ordering of light neutrino masses, θ₂₃ is found be less (greater) than its maximal value, for the final baryon asymmetry Y_B to be in the observed range. Besides, an upper and a lower bound on the mass of N₁ have also been estimated. Effect of the heavier neutrinos N_2,3 on final Y_B has been worked out subsequently. The predictions of this model will be tested in the experiments such as nEXO, LEGEND, GERDA-II, T2K, NOνA, DUNE etc.