Testing T2K's Bayesian constraints with priors in alternate parameterisations



Abe, A, Abe, S, Akutsu, R, Alarakia-Charles, H, Hakim, YI Alj, Monsalve, S Alonso, Anthony, L, Aoki, S, Apte, KA, Arai, T
et al (show 393 more authors) (2025) Testing T2K's Bayesian constraints with priors in alternate parameterisations EUROPEAN PHYSICAL JOURNAL C, 85 (12). 1414-. ISSN 1434-6044, 1434-6052

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Abstract

Bayesian analysis results require a choice of prior distribution. In long-baseline neutrino oscillation physics, the usual parameterisation of the mixing matrix induces a prior that privileges certain neutrino mass and flavour state symmetries. Here we study the effect of privileging alternate symmetries on the results of the T2K experiment. We find that constraints on the level of CP violation (as given by the Jarlskog invariant) are robust under the choices of prior considered in the analysis. On the other hand, the degree of octant preference for the atmospheric angle depends on which symmetry has been privileged.

Item Type: Article
Uncontrolled Keywords: T2K Collaboration
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Science & Engineering > School of Physical Sciences > Physics
Depositing User: Symplectic Admin
Date Deposited: 19 Dec 2025 10:18
Last Modified: 16 Jun 2026 07:12
DOI: 10.1140/epjc/s10052-025-14836-0
Open Access URL: https://link.springer.com/article/10.1140/epjc/s10...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3196197
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