Testing T2K's Bayesian constraints with priors in alternate parameterisations
High Energy Physics - Experiment
2025-12-16 v1 High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.2507.02101,
title = {Testing T2K's Bayesian constraints with priors in alternate parameterisations},
author = {The T2K Collaboration and K. Abe and S. Abe and R. Akutsu and H. Alarakia-Charles and Y. I. Alj Hakim and S. Alonso Monsalve and L. Anthony and S. Aoki and K. A. Apte and T. Arai and T. Arihara and S. Arimoto and Y. Ashida and E. T. Atkin and N. Babu and V. Baranov and G. J. Barker and G. Barr and D. Barrow and P. Bates and L. Bathe-Peters and M. Batkiewicz-Kwasniak and N. Baudis and V. Berardi and L. Berns and S. Bhattacharjee and A. Blanchet and A. Blondel and P. M. M. Boistier and S. Bolognesi and S. Bordoni and S. B. Boyd and C. Bronner and A. Bubak and M. Buizza Avanzini and J. A. Caballero and F. Cadoux and N. F. Calabria and S. Cao and S. Cap and D. Carabadjac and S. L. Cartwright and M. P. Casado and M. G. Catanesi and J. Chakrani and A. Chalumeau and D. Cherdack and P. S. Chong and A. Chvirova and J. Coleman and G. Collazuol and F. Cormier and A. A. L. Craplet and A. Cudd and D. D'ago and C. Dalmazzone and T. Daret and P. Dasgupta and C. Davis and Yu. I. Davydov and P. de Perio and G. De Rosa and T. Dealtry and C. Densham and A. Dergacheva and R. Dharmapal Banerjee and F. Di Lodovico and G. Diaz Lopez and S. Dolan and D. Douqa and T. A. Doyle and O. Drapier and K. E. Duffy and J. Dumarchez and P. Dunne and K. Dygnarowicz and A. Eguchi and J. Elias and S. Emery-Schrenk and G. Erofeev and A. Ershova and G. Eurin and D. Fedorova and S. Fedotov and M. Feltre and L. Feng and D. Ferlewicz and A. J. Finch and M. D. Fitton and C. Forza and M. Friend and Y. Fujii and Y. Fukuda and Y. Furui and J. García-Marcos and A. C. Germer and L. Giannessi and C. Giganti and M. Girgus and V. Glagolev and M. Gonin and R. González Jiménez and J. González Rosa and E. A. G. Goodman and K. Gorshanov and P. Govindaraj and M. Grassi and M. Guigue and F. Y. Guo and D. R. Hadley and S. Han and D. A. Harris and R. J. Harris and T. Hasegawa and C. M. Hasnip and S. Hassani and N. C. Hastings and Y. Hayato and I. Heitkamp and D. Henaff and Y. Hino and J. Holeczek and A. Holin and T. Holvey and N. T. Hong Van and T. Honjo and M. C. F. Hooft and K. Hosokawa and J. Hu and A. K. Ichikawa and K. Ieki and M. Ikeda and T. Ishida and M. Ishitsuka and H. Ito and S. Ito and A. Izmaylov and N. Jachowicz and S. J. Jenkins and C. Jesús-Valls and M. Jia and J. J. Jiang and J. Y. Ji and T. P. Jones and P. Jonsson and S. Joshi and M. Kabirnezhad and A. C. Kaboth and H. Kakuno and J. Kameda and S. Karpova and V. S. Kasturi and Y. Kataoka and T. Katori and A. Kawabata and Y. Kawamura and M. Kawaue and E. Kearns and M. Khabibullin and A. Khotjantsev and T. Kikawa and S. King and V. Kiseeva and J. Kisiel and A. Klustová and L. Kneale and H. Kobayashi and L. Koch and S. Kodama and M. Kolupanova and A. Konaka and L. L. Kormos and Y. Koshio and K. Kowalik and Y. Kudenko and Y. Kudo and A. Kumar Jha and R. Kurjata and V. Kurochka and T. Kutter and L. Labarga and M. Lachat and K. Lachner and J. Lagoda and S. M. Lakshmi and M. Lamers James and A. Langella and D. H. Langridge and J. -F. Laporte and D. Last and N. Latham and M. Laveder and L. Lavitola and M. Lawe and D. Leon Silverio and S. Levorato and S. V. Lewis and B. Li and C. Lin and R. P. Litchfield and S. L. Liu and W. Li and A. Longhin and A. Lopez Moreno and L. Ludovici and X. Lu and T. Lux and L. N. Machado and L. Magaletti and K. Mahn and K. K. Mahtani and M. Mandal and S. Manly and A. D. Marino and D. G. R. Martin and D. A. Martinez Caicedo and L. Martinez and M. Martini and T. Matsubara and R. Matsumoto and V. Matveev and C. Mauger and K. Mavrokoridis and N. McCauley and K. S. McFarland and C. McGrew and J. McKean and A. Mefodiev and G. D. Megias and L. Mellet and C. Metelko and M. Mezzetto and S. Miki and V. Mikola and E. W. Miller and A. Minamino and O. Mineev and S. Mine and J. Mirabito and M. Miura and S. Moriyama and S. Moriyama and P. Morrison and Th. A. Mueller and D. Munford and A. Muñoz and L. Munteanu and Y. Nagai and T. Nakadaira and K. Nakagiri and M. Nakahata and Y. Nakajima and K. D. Nakamura and A. Nakano and Y. Nakano and S. Nakayama and T. Nakaya and K. Nakayoshi and C. E. R. Naseby and D. T. Nguyen and V. Q. Nguyen and K. Niewczas and S. Nishimori and Y. Nishimura and Y. Noguchi and T. Nosek and F. Nova and P. Novella and J. C. Nugent and H. M. O'Keeffe and L. O'Sullivan and R. Okazaki and W. Okinaga and K. Okumura and T. Okusawa and N. Onda and N. Ospina and L. Osu and N. Otani and Y. Oyama and V. Paolone and J. Pasternak and D. Payne and M. Pfaff and L. Pickering and B. Popov and A. J. Portocarrero Yrey and M. Posiadala-Zezula and Y. S. Prabhu and H. Prasad and F. Pupilli and B. Quilain and P. T. Quyen and E. Radicioni and B. Radics and M. A. Ramirez and R. Ramsden and P. N. Ratoff and M. Reh and G. Reina and C. Riccio and D. W. Riley and E. Rondio and S. Roth and N. Roy and A. Rubbia and L. Russo and A. Rychter and W. Saenz and K. Sakashita and S. Samani and F. Sánchez and E. M. Sandford and Y. Sato and T. Schefke and C. M. Schloesser and K. Scholberg and M. Scott and Y. Seiya and T. Sekiguchi and H. Sekiya and T. Sekiya and D. Seppala and D. Sgalaberna and A. Shaikhiev and M. Shiozawa and Y. Shiraishi and A. Shvartsman and N. Skrobova and K. Skwarczynski and D. Smyczek and M. Smy and J. T. Sobczyk and H. Sobel and F. J. P. Soler and A. J. Speers and R. Spina and A. Srivastava and P. Stowell and Y. Stroke and I. A. Suslov and A. Suzuki and S. Y. Suzuki and M. Tada and S. Tairafune and A. Takeda and Y. Takeuchi and K. Takeya and H. K. Tanaka and H. Tanigawa and V. V. Tereshchenko and N. Thamm and C. Touramanis and N. Tran and T. Tsukamoto and M. Tzanov and Y. Uchida and M. Vagins and M. Varghese and I. Vasilyev and G. Vasseur and E. Villa and U. Virginet and T. Vladisavljevic and T. Wachala and S. -i. Wada and D. Wakabayashi and H. T. Wallace and J. G. Walsh and L. Wan and D. Wark and M. O. Wascko and A. Weber and R. Wendell and M. J. Wilking and C. Wilkinson and J. R. Wilson and K. Wood and C. Wret and J. Xia and K. Yamamoto and T. Yamamoto and C. Yanagisawa and Y. Yang and T. Yano and N. Yershov and U. Yevarouskaya and M. Yokoyama and Y. Yoshimoto and N. Yoshimura and R. Zaki and A. Zalewska and J. Zalipska and G. Zarnecki and J. Zhang and X. Y. Zhao and H. Zheng and H. Zhong and T. Zhu and M. Ziembicki and E. D. Zimmerman and M. Zito and S. Zsoldos},
journal= {arXiv preprint arXiv:2507.02101},
year = {2025}
}