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arXiv · 1807.00023

Mu-tau symmetry and the Littlest Seesaw

Stephen F. King·Celso C. Nishi
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Abstract

Motivated by the latest neutrino oscillation data which is consistent with maximal atmospheric mixing and maximal leptonic CP violation, we review various results in $μτ$ symmetry, then include several new observations and clarifications, including identifying a new general form of neutrino mass matrix with $μτ$ symmetry. We then apply the new results to the neutrino mass matrix associated with the Littlest Seesaw model, and show that it approximately satisfies the new general form with $μτ$ symmetry, and that this is responsible for its approximate predictions of maximal atmospheric mixing and maximal CP violation in the lepton sector.

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Stephen F. King, Celso C. Nishi. 2018-09-10. Mu-tau symmetry and the Littlest Seesaw. https://doi.org/10.1016/j.physletb.2018.08.056

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