PHYSICAL REVIEW D 108, 072011 (2023)

ISSN: 2470-0029, SCIE

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

The T2K collaboration (K. Abe, ..., N. T. Hong Van, ...)

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 Δm2 32 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 × 10 21 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

DOI: DOI: 10.1103/PhysRevD.108.072011