Mu-tau reflection symmetry with a high scale texture-zero

Abstract

The $\mu \tau$-reflection symmetric neutrino mass matrix can accommodate all known neutrino mixing angles, with maximal atmospheric angle fixed, and predicts all the unknown CP phases of the lepton sector but is unable to predict the absolute neutrino mass scale. Here we present a highly predictive scenario where $\mu \tau$-reflection is combined with a discrete abelian symmetry to enforce a texture-zero in the mass matrix of the heavy right-handed neutrinos that generate the light neutrino masses. Such a restriction reduces the free parameters of the low energy theory to zero and the absolute neutrino mass scale is restricted to few discrete regions, three in the few meV range and one extending up to around 30 meV. The heavy neutrino sector is dependent only on two free parameters which are further restricted to small regions from the requirement of successful leptogenesis. Mass degenerate heavy neutrinos are possible in one case but there is no resonant enhancement of the CP asymmetry.

arXiv comment22 pages, 8 figures. One figure on neutrinoless double beta decay added. Published version

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Cited by in corpus (12)

• Neutrino Non-Standard Interactions: A Status Report
• Leptogenesis from Low Energy $CP$ Violation
• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• Vacuum stability conditions of the economical 3-3-1 model from copositivity
• Phase broken $\mu -\tau$ symmetry and the neutrino mass hierarchy
• Flavoured leptogenesis and ${\mathrm{CP}}^{\mu \tau }$ symmetry
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• Leptogenesis in the $\mu \tau$ basis
• RGE-induced $\mu$-$\tau$ symmetry breaking: an analysis of the latest T2K results