Work

Viability of A4, S4 and A5 flavour symmetries in light of the first JUNO result

Year: 2026

Type: article

Abstract: We update the analysis of the viability of the lepton mixing patterns originating from A 4 , S 4 and A 5 discrete flavour symmetries and leading to predictions for the solar neutrino mixing angle, θ 12 . We perform a statistical analysis using as an input (i) the results of the latest global fit to neutrino oscillation data, and (ii) the first JUNO measurement of sin 2 θ 12 . Out of the five (four) cases compatible with the global data at 3 σ for normal (inverted) neutrino mass ordering, only three (two) cases remain compatible with the global data at the same confidence level after taking into account the JUNO result.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2026.140295

Authors: S.T. Petcov, A.V. Titov

Institutions: Scuola Internazionale Superiore di Studi Avanzati, Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova

Language: English

Topic: Neutrino Physics Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond