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

Abstract

In this paper, we make an attempt to combine the neutrino trimaximal (TM1 and TM2) mixings and $\mu$-$\tau$ 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 ${\theta }_{13}^{}$ 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 $\mu$-$\tau$ reflection symmetry with texture zeros.

arXiv comment25 pages, 10 figures, minor revisions, version accepted for publication in EPJC

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• Identifying a minimal flavor symmetry of the seesaw mechanism behind neutrino oscillations
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• Approximate magic symmetry in a cobimaximal scenario of Majorana neutrinos