Determination of the Third Neutrino-Mixing Angle {\theta}_(13) and its Implications

TL;DR

This paper reviews the recent definitive measurement of the neutrino mixing angle { heta}_(13), highlighting its implications for future neutrino physics research and providing an accessible overview for students and young physicists.

Contribution

It offers a pedagogical review of the recent experimental determination of { heta}_(13) and discusses its significance for ongoing and future neutrino experiments.

Findings

{ heta}_(13) measured as sin^2(2{ heta}_(13))=0.1

Implications for determining remaining neutrino parameters

Close to previous upper limit of { heta}_(13)

Abstract

Till 2010 we had three unknown parameters of neutrino oscillation: the third mixing angle {\theta}_(13), the sign of the larger mass difference {\Delta}m^(2)_(31) and the CP violating phase {\delta}. Thanks to a number of consistent experimental results since then, culminating in the recent Daya Bay reactor neutrino data, we have a definitive determination of {\theta}_(13) now. Moreover its measured value, sin^(2)_(2 {\theta}_(13)) = 0.1, is close to its earlier upper limit. This has promising implications for the determination of the two remaining unknown parameters from the present and proposed accelerator neutrino experiments in the foreseeable future. This article presents a pedagogical review of these profound developments for the wider community of young physicists including university students.