Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ve interactions at the far detector

The T2K Collaboration

研究成果: Article

68 引用 (Scopus)

抄録

The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. Asample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, j?m2 32j, sin2 ?23, sin2 ?13, and dCP and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on sin2 ?13.When combined with reactor measurements, the hypothesis of CP conservation (dCP 0 or p) is excluded at 90% confidence level. The 90% confidence region for dCP is -2.95;-0.44(-1.47;-1.27) for normal (inverted) ordering. The central values and 68% confidence intervals for the other oscillation parameters for normal (inverted) ordering are ?m2 32 2.540.082.510.08 10-3 eV2=c4 and sin2?23 0.55+0.05 -0.09 (0.55+0.05 -0.08 ), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for sin2 ?23 (Bayes factor 2.4).

元の言語English
記事番号092006
ジャーナルPhysical Review D
96
発行部数9
DOI
出版物ステータスPublished - 2017 11 1
外部発表Yes

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antineutrinos
neutrinos
oscillations
detectors
confidence
interactions
reactors
intervals
conservation
pions
inclusions
sensitivity
rings
decay

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

これを引用

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title = "Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ve interactions at the far detector",
abstract = "The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. Asample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, j?m2 32j, sin2 ?23, sin2 ?13, and dCP and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on sin2 ?13.When combined with reactor measurements, the hypothesis of CP conservation (dCP 0 or p) is excluded at 90{\%} confidence level. The 90{\%} confidence region for dCP is -2.95;-0.44(-1.47;-1.27) for normal (inverted) ordering. The central values and 68{\%} confidence intervals for the other oscillation parameters for normal (inverted) ordering are ?m2 32 2.540.082.510.08 10-3 eV2=c4 and sin2?23 0.55+0.05 -0.09 (0.55+0.05 -0.08 ), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for sin2 ?23 (Bayes factor 2.4).",
author = "{The T2K Collaboration} and K. Abe and J. Amey and C. Andreopoulos and M. Antonova and S. Aoki and A. Ariga and Y. Ashida and S. Ban and M. Barbi and Barker, {G. J.} and G. Barr and C. Barry and M. Batkiewicz and V. Berardi and S. Berkman and S. Bhadra and S. Bienstock and A. Blondel and S. Bolognesi and S. Bordoni and Boyd, {S. B.} and D. Brailsford and A. Bravar and C. Bronner and {Buizza Avanzini}, M. and Calland, {R. G.} and T. Campbell and S. Cao and Cartwright, {S. L.} and Catanesi, {M. G.} and A. Cervera and A. Chappell and C. Checchia and D. Cherdack and N. Chikuma and G. Christodoulou and J. Coleman and G. Collazuol and D. Coplowe and A. Cudd and A. Dabrowska and {De Rosa}, G. and T. Dealtry and Denner, {P. F.} and Dennis, {S. R.} and C. Densham and {Di Lodovico}, F. and S. Dolan and O. Drapier and Yasuhiro Nishimura",
year = "2017",
month = "11",
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language = "English",
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T1 - Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ve interactions at the far detector

AU - The T2K Collaboration

AU - Abe, K.

AU - Amey, J.

AU - Andreopoulos, C.

AU - Antonova, M.

AU - Aoki, S.

AU - Ariga, A.

AU - Ashida, Y.

AU - Ban, S.

AU - Barbi, M.

AU - Barker, G. J.

AU - Barr, G.

AU - Barry, C.

AU - Batkiewicz, M.

AU - Berardi, V.

AU - Berkman, S.

AU - Bhadra, S.

AU - Bienstock, S.

AU - Blondel, A.

AU - Bolognesi, S.

AU - Bordoni, S.

AU - Boyd, S. B.

AU - Brailsford, D.

AU - Bravar, A.

AU - Bronner, C.

AU - Buizza Avanzini, M.

AU - Calland, R. G.

AU - Campbell, T.

AU - Cao, S.

AU - Cartwright, S. L.

AU - Catanesi, M. G.

AU - Cervera, A.

AU - Chappell, A.

AU - Checchia, C.

AU - Cherdack, D.

AU - Chikuma, N.

AU - Christodoulou, G.

AU - Coleman, J.

AU - Collazuol, G.

AU - Coplowe, D.

AU - Cudd, A.

AU - Dabrowska, A.

AU - De Rosa, G.

AU - Dealtry, T.

AU - Denner, P. F.

AU - Dennis, S. R.

AU - Densham, C.

AU - Di Lodovico, F.

AU - Dolan, S.

AU - Drapier, O.

AU - Nishimura, Yasuhiro

PY - 2017/11/1

Y1 - 2017/11/1

N2 - The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. Asample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, j?m2 32j, sin2 ?23, sin2 ?13, and dCP and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on sin2 ?13.When combined with reactor measurements, the hypothesis of CP conservation (dCP 0 or p) is excluded at 90% confidence level. The 90% confidence region for dCP is -2.95;-0.44(-1.47;-1.27) for normal (inverted) ordering. The central values and 68% confidence intervals for the other oscillation parameters for normal (inverted) ordering are ?m2 32 2.540.082.510.08 10-3 eV2=c4 and sin2?23 0.55+0.05 -0.09 (0.55+0.05 -0.08 ), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for sin2 ?23 (Bayes factor 2.4).

AB - The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. Asample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, j?m2 32j, sin2 ?23, sin2 ?13, and dCP and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on sin2 ?13.When combined with reactor measurements, the hypothesis of CP conservation (dCP 0 or p) is excluded at 90% confidence level. The 90% confidence region for dCP is -2.95;-0.44(-1.47;-1.27) for normal (inverted) ordering. The central values and 68% confidence intervals for the other oscillation parameters for normal (inverted) ordering are ?m2 32 2.540.082.510.08 10-3 eV2=c4 and sin2?23 0.55+0.05 -0.09 (0.55+0.05 -0.08 ), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for sin2 ?23 (Bayes factor 2.4).

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U2 - 10.1103/PhysRevD.96.092006

DO - 10.1103/PhysRevD.96.092006

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JF - Physical Review D

SN - 2470-0010

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