Updated T2K measurements of muon neutrino and antineutrino disappearance using 1.5$\times$10$^{21}$ protons on target
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- Amey, J.
- Andreopoulos, C.
- Antonova, M.
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- Hansen, D.
- Harada, J.
- Hartz, M.
- Hasegawa, T.
- Hastings, N.C.
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- Hayato, Y.
- Helmer, R.L.
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- Hiramoto, A.
- Hirota, S.
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- Holeczek, J.
- Hosomi, F.
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- Yano, T.
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- Yershov, N.
- Yokoyama, M.
- Yoshida, K.
- Yuan, T.
- Yu, M.
- Zalewska, A.
- Zalipska, J.
- Zambelli, L.
- Zaremba, K.
- Ziembicki, M.
- Zimmerman, E.D.
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- Zmuda, J.
DOIAbstract
International audienceWe report measurements by the T2K experiment of the parameters θ23 and Δm322 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 7.482×1020 POT in neutrino running mode and 7.471×1020 POT in antineutrino mode, T2K obtained sin2(θ23)=0.51-0.07+0.08 and Δm322=2.53-0.13+0.15×10-3 eV2/c4 for neutrinos, and sin2(θ¯23)=0.42-0.07+0.25 and Δm¯232=2.55-0.27+0.33×10-3 eV2/c4 for antineutrinos (assuming normal mass ordering). No significant differences between the values of the paramete...
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