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

ContributorsT2K Collaboration
Published inPhysical review. D, vol. 108, no. 7
Publication date2023
First online date2023-10-12
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.

eng
Keywords
  • Neutrino/mu: secondary beam
  • Neutrino: oscillation
  • Neutrino: mixing angle
  • Neutrino: mass difference
  • CPT: violation
  • Antineutrino: oscillation
  • Symmetry: violation
  • Antineutrino/mu: secondary beam
  • J-PARC Lab
  • KAMIOKANDE
  • Error: statistical
  • Neutrino: detector
  • Near detector
  • Neutrino: flux
  • Experimental results
Funding
  • French National Research Agency (ANR) - Systematics UNcertainties in Combinations of neutrino Oscillation Results [ANR-19-CE31-0001]
Citation (ISO format)
T2K Collaboration. Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6×10<sup>21</sup> protons on target. In: Physical review. D, 2023, vol. 108, n° 7. doi: 10.1103/physrevd.108.072011
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Article (Published version)
Identifiers
ISSN of the journal2470-0010
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