- 1707.01048v2
**Rights statement:**© 2017 American Physical SocietyAccepted author manuscript, 4.97 MB, PDF document

Available under license: CC BY: Creative Commons Attribution 4.0 International License

- https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.092006
Final published version

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Published

In: Physical Review D, Vol. 96, No. 9, 092006, 21.11.2017.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

T2K Collaboration 2017, 'Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector', *Physical Review D*, vol. 96, no. 9, 092006. https://doi.org/10.1103/PhysRevD.96.092006

T2K Collaboration (2017). Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector. *Physical Review D*, *96*(9), Article 092006. https://doi.org/10.1103/PhysRevD.96.092006

T2K Collaboration. Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector. Physical Review D. 2017 Nov 21;96(9):092006. doi: 10.1103/PhysRevD.96.092006

@article{e091264eedb742289ff91a398c3f42b9,

title = "Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector",

abstract = "The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. A sample 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, $|\Delta m^2_{32}|$, $\sin^2(\theta_{23})$, $\sin^2(\theta_{13})$, and $\delta_{CP}$ 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 $\sin^2(\theta_{13})$. When combined with reactor measurements, the hypothesis of CP conservation ($\delta_{CP}$$=0$ or $\pi$) is excluded at 90% confidence level. The 90% confidence region for $\delta_{CP}$ 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 $\Delta m^{2}_{32}=2.54\pm0.08$ ($2.51\pm0.08$) $\times 10^{-3}$ eV$^2 / c^4$ and $\sin^2(\theta_{23}) = 0.55^{+0.05}_{-0.09}$ ($0.55^{+0.05}_{-0.08}$), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for $\sin^2(\theta_{23})$ (Bayes factor 2.4).",

keywords = "hep-ex",

author = "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 D. Brailsford and A. Bravar and C. Bronner and Avanzini, {M. Buizza} and Calland, {R. G.} and T. Campbell and S. Cao 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 Rosa, {G. De} and T. Dealtry and Finch, {A. J.} and A. Knox and Kormos, {L. L.} and I. Lamont and M. Lawe and J. Nowak and O'Keeffe, {H. M.} and Ratoff, {P. N.} and D. Shaw and {T2K Collaboration}",

note = "{\textcopyright} 2017 American Physical Society",

year = "2017",

month = nov,

day = "21",

doi = "10.1103/PhysRevD.96.092006",

language = "English",

volume = "96",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "9",

}

TY - JOUR

T1 - Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector

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 - Brailsford, D.

AU - Bravar, A.

AU - Bronner, C.

AU - Avanzini, M. Buizza

AU - Calland, R. G.

AU - Campbell, T.

AU - Cao, S.

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 - Rosa, G. De

AU - Dealtry, T.

AU - Finch, A. J.

AU - Knox, A.

AU - Kormos, L. L.

AU - Lamont, I.

AU - Lawe, M.

AU - Nowak, J.

AU - O'Keeffe, H. M.

AU - Ratoff, P. N.

AU - Shaw, D.

AU - T2K Collaboration

N1 - © 2017 American Physical Society

PY - 2017/11/21

Y1 - 2017/11/21

N2 - The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. A sample 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, $|\Delta m^2_{32}|$, $\sin^2(\theta_{23})$, $\sin^2(\theta_{13})$, and $\delta_{CP}$ 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 $\sin^2(\theta_{13})$. When combined with reactor measurements, the hypothesis of CP conservation ($\delta_{CP}$$=0$ or $\pi$) is excluded at 90% confidence level. The 90% confidence region for $\delta_{CP}$ 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 $\Delta m^{2}_{32}=2.54\pm0.08$ ($2.51\pm0.08$) $\times 10^{-3}$ eV$^2 / c^4$ and $\sin^2(\theta_{23}) = 0.55^{+0.05}_{-0.09}$ ($0.55^{+0.05}_{-0.08}$), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for $\sin^2(\theta_{23})$ (Bayes factor 2.4).

AB - The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. A sample 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, $|\Delta m^2_{32}|$, $\sin^2(\theta_{23})$, $\sin^2(\theta_{13})$, and $\delta_{CP}$ 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 $\sin^2(\theta_{13})$. When combined with reactor measurements, the hypothesis of CP conservation ($\delta_{CP}$$=0$ or $\pi$) is excluded at 90% confidence level. The 90% confidence region for $\delta_{CP}$ 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 $\Delta m^{2}_{32}=2.54\pm0.08$ ($2.51\pm0.08$) $\times 10^{-3}$ eV$^2 / c^4$ and $\sin^2(\theta_{23}) = 0.55^{+0.05}_{-0.09}$ ($0.55^{+0.05}_{-0.08}$), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for $\sin^2(\theta_{23})$ (Bayes factor 2.4).

KW - hep-ex

U2 - 10.1103/PhysRevD.96.092006

DO - 10.1103/PhysRevD.96.092006

M3 - Journal article

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 9

M1 - 092006

ER -