TY  - JOUR
AU  - T2K Collaboration (Abe, K. et al
AU  - Antonova, M.
AU  - Cervera-Villanueva, A.
PY  - 2021
DA  - 2021//
TI  - T2K measurements of muon neutrino and antineutrino disappearance using 3.13 x 10(21) protons on target
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - L011101 - 9pp
VL  - 103
IS  - 1
PB  - Amer Physical Soc
AB  - We report measurements by the T2K experiment of the parameters theta(23) and Delta m(32)(2), which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from 1.49 x 10(21) protons on target (POT) in neutrino mode and 1.64 x 10(21) POT in antineutrino mode are used. The best-fit values obtained by T2K were sin(2)(theta(23)) = 0.51(-0.07)(+0.06) (0.43(-0.05)(+0.21)) and Delta m(32)(2) = 2.47(-0.09)(+0.08) (2.50(-0.13)(+0.18)) x 10(-3) eV(2)/c(4) for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavor neutrino oscillation model where the sine of the mixing angle is allowed to take nonphysical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2008.07921
UR  - https://doi.org/10.1103/PhysRevD.103.L011101
DO  - 10.1103/PhysRevD.103.L011101
LA  - English
N1  - WOS:000612138600005
ID  - T2KCollaborationAbe_etal2021
ER  -