A combination of the neutrino trimaximal mixings and $$\mu $$ μ - $$\tau $$ τ reflection symmetry in the type-I seesaw model

Abstract

Abstract In this paper, we make an attempt to combine the neutrino trimaximal (TM1 and TM2) mixings and $$\mu $$ μ - $$\tau $$ τ reflection symmetry in the type-I seesaw model. Such a scenario is highly restrictive and predictive: in addition to three right-handed neutrino masses, there are only five real parameters; all the lepton flavor mixing parameters except for $$\theta ^{}_{13}$$ θ 13 will be predicted. The relations between the model parameters and the measurable neutrino parameters will be derived. The implications of this scenario for leptogenesis will be explored in detail. A further reduction of this scenario to the more restrictive and predictive minimal seesaw model with only two right-handed neutrinos will also be considered. In addition, we will also discuss a possible approach to get the desired mass matrices and study the compatibility of the trimaximal $$\mu $$ μ - $$\tau $$ τ reflection symmetry with texture zeros.