Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> </mml:math> -like Sample

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×10^{20} 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 sin^{2}θ_{23} with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δ_{CP}=-2.18_{-0.47}^{+1.22}, sin^{2}θ_{23}=0.559_{-0.078}^{+0.018} and Δm_{32}^{2}=(+2.506_{-0.052}^{+0.039})×10^{-3} eV^{2}.

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Publication Details

Journal
Physical Review Letters
Published
2025-11-26
DOI
https://doi.org/10.1103/gh5j-5cwv
Primary Topic
Neutrino Physics Research
Type
article
Field-Weighted Citation Impact
0.00
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article

Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> </mml:math> -like Sample

Karl J. Friston
Physical Review Letters
Neutrino Physics Research
article

Results from the T2K Experiment on Neutrino Mixing Including a New Far Detector <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> </mml:math> -like Sample

Karl J. Friston
article en

Abstract

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)×10^{20} 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 sin^{2}θ_{23} with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of δ_{CP}=-2.18_{-0.47}^{+1.22}, sin^{2}θ_{23}=0.559_{-0.078}^{+0.018} and Δm_{32}^{2}=(+2.506_{-0.052}^{+0.039})×10^{-3} eV^{2}.

Physical Review LettersVol. 135(26)
Warsaw University of Technology (PL), University of Geneva (CH), Louisiana State University (US), Rutherford Appleton Laboratory (GB), State University of New York (US), University of Padua (IT), High Energy Accelerator Research Organization (JP), University of British Columbia (CA), University of Liverpool (GB), Lawrence Berkeley National Laboratory (US), Miyagi University of Education (JP), Tokyo University of Science (JP), Okayama University (JP), University of Pittsburgh (US), Duke University (US), Yokohama National University (JP), King's College London (GB), Royal Holloway University of London (GB), South Dakota School of Mines and Technology (US), York University (CA), Johannes Gutenberg University Mainz (DE), Tohoku University (JP), Keio University (JP), Kyoto University (JP), Université Paris-Saclay (FR), University of Minnesota System (US), Ghent University Hospital (BE), University of Colorado System (US), University of California System (US), Joint Institute for Nuclear Research (RU), California University of Pennsylvania (US), University of Warwick (GB), Sorbonne Université (FR), University of Oxford (GB), Shanghai Institute for Science of Science (CN), Bridge University (SS), National Centre for Nuclear Research (PL), Institute of Particle Physics (CA), Institute for Nuclear Research (RU), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Institute of Nuclear Physics, Polish Academy of Sciences (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Bari (IT), Barcelona Institute of Science and Technology (ES), Laboratoire Leprince-Ringuet (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), University of Toyama (JP), Osaka Metropolitan University (JP), Laboratoire Médiations (FR), Institute of Science and Technology, Institute of Science Tokyo (JP), University of Houston (US), University of Warsaw (PL), Imperial College London (GB), University of Rochester (US), Stony Brook University (US), Universidad Autónoma de Madrid (ES), Kobe University (JP), European Organization for Nuclear Research (CH), Lancaster University (GB), VNU University of Science (VN), Polytechnic University of Bari (IT), Tokyo Metropolitan University (JP), Vietnam Academy of Science and Technology (VN), The University of Tokyo (JP), University of Glasgow (GB), Universidad de Sevilla (ES), University of Silesia in Katowice (PL), Michigan State University (US), RWTH Aachen University (DE), University of Sheffield (GB), Stanford University (US)
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Neutrino Physics Research
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