Updated T2K measurements of muon neutrino and antineutrino disappearance using 1.5 x10 21 protons on target

UNSPECIFIED (2017) Updated T2K measurements of muon neutrino and antineutrino disappearance using 1.5 x10 21 protons on target. Physical Review D, 96 (1): 011102(R). ISSN 1550-7998

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Abstract

We report measurements by the T2K experiment of the parameters $\theta_{23}$ and $\Delta m^{2}_{32}$ governing the disappearance of muon neutrinos and antineutrinos in the three flavor neutrino oscillation model. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, the parameters are measured separately for neutrinos and antineutrinos. Using $7.482 \times 10^{20}$ POT in neutrino running mode and $7.471 \times 10^{20}$ POT in antineutrino mode, T2K obtained, $\sin^{2}(\theta_{23})=0.51^{+0.08}_{-0.07}$ and $\Delta m^{2}_{32} = 2.53^{+0.15}_{-0.13} \times 10^{-3}$eV$^{2}$/c$^{4}$ for neutrinos, and $\sin^{2}({\overline{\theta}}_{23})=0.42^{+0.25}_{-0.07}$ and ${\Delta\overline{m}^2}_{32} = 2.55^{+0.33}_{-0.27} \times 10^{-3}$eV$^{2}$/c$^{4}$ for antineutrinos (assuming normal mass ordering). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
87048
Deposited By:
Deposited On:
13 Jul 2017 15:26
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2023 00:31