Finite quantum corrections to the tribimaximal neutrino mixing

TL;DR

This paper investigates how finite quantum corrections can alter the tribimaximal neutrino mixing pattern, explaining the smallness of 13 and the emergence of CP-violating phases in neutrino physics.

Contribution

It introduces a theoretical framework for quantum corrections to neutrino mixing, highlighting the sensitivity of mixing angles and the radiative origin of CP phases.

Findings

12 can be naturally small due to quantum corrections

CP-violating phases can arise from Majorana phases through radiative effects

Mixing angles can significantly depart from tree-level predictions

Abstract

We calculate finite quantum corrections to the tribimaximal neutrino mixing pattern V_TB in three generic classes of neutrino mass models. We show that three flavor mixing angles can all depart from their tree-level results described by V_TB, among which \theta_12 is most sensitive to such quantum effects, and the Dirac CP-violating phase can radiatively arise from two Majorana CP-violating phases. This theoretical scheme offers a new way to understand why \theta_13 is naturally small and how three CP-violating phases are presumably correlated.