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Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6×1021 protons on target

  • T2K Collaboration
  • The University of Tokyo
  • Queen Mary University of London
  • High Energy Accelerator Research Organization, Tsukuba
  • TRIUMF
  • University of Winnipeg
  • Swiss Federal Institute of Technology Zurich
  • University of Liverpool
  • University of Valencia
  • Kobe University
  • Tokyo Metropolitan University
  • Yokohama National University
  • Kyoto University
  • Imperial College London
  • University of Regina
  • University of Warwick
  • University of Oxford
  • Institute of Nuclear Physics
  • Polytechnic University of Bari
  • Tohoku University
  • York University Toronto
  • University of Geneva
  • Sorbonne Université
  • Université Paris-Saclay
  • University of Wrocław
  • University of Silesia in Katowice
  • Laboratoire Leprince-Ringuet
  • University of Seville
  • ICISE
  • Royal Holloway University of London
  • University of Sheffield
  • Institute for High Energy Physics
  • University of Houston
  • University of Pennsylvania
  • CERN
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Joint Institute for Nuclear Research

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and nonstandard interactions can violate this symmetry. In this work we report the measurements of sin2θ23 and Δm322 independently for neutrinos and antineutrinos. The aforementioned symmetry violation would manifest as an inconsistency in the neutrino and antineutrino oscillation parameters. The analysis discussed here uses a total of 1.97×1021 and 1.63×1021 protons on target taken with a neutrino and antineutrino beam respectively, and benefits from improved flux and cross section models, new near-detector samples and more than double the data reducing the overall uncertainty of the result. No significant deviation is observed, consistent with the standard neutrino oscillation picture.

Original languageEnglish
Article number072011
JournalPhysical Review D
Volume108
Issue number7
DOIs
StatePublished - Oct 1 2023

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