Discrete symmetries and neutrino mass perturbations for theta(13)

作者：Hall L J^*; Ross G G

来源：The Journal of High Energy Physics, 2013, 2013(11): 091.

DOI：10.1007/JHEP11(2013)091

• Neutrino Physics
• CP violation

The recent measurement of the third lepton mixing angle, theta(13), has shown that, although small compared to theta(12) and theta(23), it is much larger than anticipated in schemes that generate Tri-Bi-Maximal (TBM) or Golden Ratio (GR) mixing. We develop a model-independent formalism for perturbations away from exact TBM or GR mixing in the neutrino sector. Each resulting perturbation scheme reflects an underlying symmetry structure and involves a single complex parameter. We show that such perturbations can readily fit the observed value of theta(13), which is then correlated with a change in the other mixing angles. We also determine the implication for the lepton CP violating phases. For comparison we determine the predictions for Bi-Maximal mixing corrected by charged lepton mixing and we discuss the accuracy that will be needed to distinguish between the various schemes.

• 出版日期2013-11-12