RGE-induced $\mu$-$\tau$ symmetry breaking: an analysis of the latest T2K results

Abstract

The T2K collaboration has recently reported their results, which gives the best-fit values of the atmospheric mixing angle ${\sin }^2{\theta }_{23}=0.53$ and the Dirac CP-violating phase $\delta =-1.89$ for normal neutrino mass ordering. We give a possible theoretical origin of such values based on the $\mu$-$\tau$ reflection symmetry. It has been found that the breaking of such symmetry using one-loop renormalization-group equations (RGEs) in the framework of minimal supersymmetric standard model can fit well with the latest T2K results and the recent global fits. To make a quantitative analysis, we have included for the first time the complete dataset of oscillation, beta decay, neutrinoless double-beta decay and cosmological observations in comparing the theory to experiments. We also further examine the importance of such breaking patterns for neutrinoless double-beta decay experiments.

12 pages, 3 figures, accepted for publication in EPJC

References in corpus (6)

• Extracting Majorana Properties in the Throat of Neutrinoless Double Beta Decay
• Neutrino mu-tau reflection symmetry and its breaking in the minimal seesaw
• Mu-tau reflection symmetry with a texture-zero
• The $\mu -\tau$ reflection symmetry of Dirac neutrinos and its breaking effect via quantum corrections
• Neutrino mass ordering and μ-τreflection symmetry breaking
• Effective neutrino masses in KATRIN and future tritium beta-decay experiments