Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample

(T2K Collaboration)

doi:10.1103/gh5j-5cwv

Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample

(T2K Collaboration)

University of Tokyo
High Energy Accelerator Research Organization (KEK)
Lancaster University
The University of Sheffield
ETH Zurich
Imperial College London
Kobe University
Tokyo Metropolitan University
Kyoto University
Tohoku University
Louisiana State University
Joint Institute for Nuclear Research, Dubna
University of Warwick
University of Oxford
University of Liverpool
Institute for Nuclear Physics
Politecnico di Bari
European Organization for Nuclear Research
University of Geneva
Sorbonne Université
Université Paris-Saclay
Yokohama National University
University of Silesia
University of Seville
ICISE
Ip Paris
The Barcelona Institute of Science and Technology
University of São Paulo
Ernest Orlando Lawrence Berkeley National Laboratory
University of Houston
Institute for Nuclear Research of the Russian Academy of Sciences
University of Padova
TRIUMF
University of Colorado Boulder
Eötvös Loránd University
University of Pennsylvania School of Arts and Sciences
University of Naples Federico II
CCLRC Rutherford Appleton Laboratory
Wroclaw University
King's College London
Warsaw University of Technology
University of Rochester
J-PARC
Miyagi University of Education
Ghent University
University of Warsaw
University of Glasgow
Stony Brook University
York University
Vietnam Academy of Science and Technology (VAST)
Osaka City University
Tokyo University of Science
Royal Holloway University of London
Keio University
Boston University
Johannes Gutenberg University
Okayama University
National Centre for Nuclear Research (NCBJ)
National Research Nuclear University MEPhI
Universidad Autónoma de Madrid
South Dakota School of Mines and Technology
University of Rome
Michigan State University
IPSA-DRII
Tokyo Institute of Technology
Long Beach VA and University of California
University of Toyama
Hanoi University of Science
University of Pittsburgh
Vietnam Academy of Science and Technology
RWTH Aachen University
Duke University
Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP)
University of Minnesota
Stanford Linear Accelerator Center
York College/The City University of New York
University of British Columbia

Research output: Contribution to journal › Article › peer-review

Abstract

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×1020 protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of sin2θ23 with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δCP=-2.18-0.47+1.22, sin2θ23=0.559-0.078+0.018 and Δm322=(+2.506-0.052+0.039)×10-3 eV2.

Original language	English
Article number	261801
Journal	Physical Review Letters
Volume	135
Issue number	26
DOIs	https://doi.org/10.1103/gh5j-5cwv
Publication status	Published - 31 Dec 2025

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10.1103/gh5j-5cwv

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@article{a10c3181bf23417f89729164381bf8a7,

title = "Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample",

abstract = "We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×1020 protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of sin2θ23 with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δCP=-2.18-0.47+1.22, sin2θ23=0.559-0.078+0.018 and Δm322=(+2.506-0.052+0.039)×10-3 eV2.",

author = "\{(T2K Collaboration)\} and K. Abe and S. Abe and R. Akutsu and H. Alarakia-Charles and \{Alj Hakim\}, \{Y. I.\} and \{Alonso Monsalve\}, S. and L. Anthony and S. Aoki and Apte, \{K. A.\} and T. Arai and T. Arihara and S. Arimoto and Y. Ashida and Atkin, \{E. T.\} and N. Babu and V. Baranov and Barker, \{G. J.\} 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 Boistier, \{P. M.M.\} and S. Bolognesi and S. Bordoni and Boyd, \{S. B.\} and C. Bronner and A. Bubak and \{Buizza Avanzini\}, M. and Caballero, \{J. A.\} and F. Cadoux and Calabria, \{N. F.\} and S. Cao and S. Cap and D. Carabadjac and Cartwright, \{S. L.\} and Casado, \{M. P.\} and Catanesi, \{M. G.\} and J. Chakrani and A. Chalumeau and D. Cherdack and O. Drapier and M. Gonin and B. Quilain",

note = "Publisher Copyright: {\textcopyright} 2025 authors.",

year = "2025",

month = dec,

day = "31",

doi = "10.1103/gh5j-5cwv",

language = "English",

volume = "135",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "26",

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TY - JOUR

T1 - Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample

AU - (T2K Collaboration)

AU - Abe, K.

AU - Abe, S.

AU - Akutsu, R.

AU - Alarakia-Charles, H.

AU - Alj Hakim, Y. I.

AU - Alonso Monsalve, S.

AU - Anthony, L.

AU - Aoki, S.

AU - Apte, K. A.

AU - Arai, T.

AU - Arihara, T.

AU - Arimoto, S.

AU - Ashida, Y.

AU - Atkin, E. T.

AU - Babu, N.

AU - Baranov, V.

AU - Barker, G. J.

AU - Barr, G.

AU - Barrow, D.

AU - Bates, P.

AU - Bathe-Peters, L.

AU - Batkiewicz-Kwasniak, M.

AU - Baudis, N.

AU - Berardi, V.

AU - Berns, L.

AU - Bhattacharjee, S.

AU - Blanchet, A.

AU - Blondel, A.

AU - Boistier, P. M.M.

AU - Bolognesi, S.

AU - Bordoni, S.

AU - Boyd, S. B.

AU - Bronner, C.

AU - Bubak, A.

AU - Buizza Avanzini, M.

AU - Caballero, J. A.

AU - Cadoux, F.

AU - Calabria, N. F.

AU - Cao, S.

AU - Cap, S.

AU - Carabadjac, D.

AU - Cartwright, S. L.

AU - Casado, M. P.

AU - Catanesi, M. G.

AU - Chakrani, J.

AU - Chalumeau, A.

AU - Cherdack, D.

AU - Drapier, O.

AU - Gonin, M.

AU - Quilain, B.

PY - 2025/12/31

Y1 - 2025/12/31

N2 - We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×1020 protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of sin2θ23 with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δCP=-2.18-0.47+1.22, sin2θ23=0.559-0.078+0.018 and Δm322=(+2.506-0.052+0.039)×10-3 eV2.

AB - We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×1020 protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of sin2θ23 with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δCP=-2.18-0.47+1.22, sin2θ23=0.559-0.078+0.018 and Δm322=(+2.506-0.052+0.039)×10-3 eV2.

UR - https://www.scopus.com/pages/publications/105026319392

U2 - 10.1103/gh5j-5cwv

DO - 10.1103/gh5j-5cwv

M3 - Article

AN - SCOPUS:105026319392

SN - 0031-9007

VL - 135

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 261801

ER -

Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector μ -like Sample

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