Checking Flavour Models at Neutrino Facilities

TL;DR

This paper evaluates the potential of upcoming neutrino experiments to distinguish between different flavour symmetry models, specifically S4 and A4, based on their predicted relations among mixing angles.

Contribution

It analyzes the experimental distinguishability of neutrino mixing relations derived from S4 and A4 symmetry models at future superbeam facilities.

Findings

Certain models can be distinguished at T2HK

Model-specific mixing angle relations can be tested

Experimental sensitivity varies between facilities

Abstract

In the recent years, the industry of model building has been the subject of the intense activity, especially after the measurement of a relatively large values of the reactor angle. Special attention has been devoted to the use of non-abelian discrete symmetries, thanks to their ability of reproducing some of the relevant features of the neutrino mixing matrix. In this paper, we consider two special relations between the leptonic mixing angles, arising from models based on S4 and A4, and study whether, and to which extent, they can be distinguished at superbeam facilities, namely T2K, NOvA and T2HK.