Neutrino oscillation physics potential of the T2K experiment

T2K Collaboration

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle Θ13 have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal sin223, the octant of Θ23, and the mass hierarchy, in addition to the measurements of δCP, sin2 Θ23, and Δm232, for various combinations of ν-mode and ν-mode data-taking. With an exposure of 7.8 × 1021 protons-on-target, T2K can achieve 1 σ resolution of 0.050 (0.054) on sin2 Θ23 and 0.040 (0.045) × 10-3 eV2 on Δm232 for 100% (50%) neutrino beam mode running assuming sin2 Θ23 = 0.5 and Δm232 = 2.4 × 10-3 eV2. T2K will have sensitivity to the CP-violating phase δCP at 90% C.L. or better over a significant range. For example, if sin223 is maximal (i.e. Θ23 = 45°) the range is -115° <δCP <-60° for normal hierarchy and +50° <δCP <+130° for inverted hierarchy. When T2K data is combined with data from the NOνA experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero δCP is substantially increased compared to if each experiment is analyzed alone.

Original languageEnglish
Article number043C01
JournalProgress of Theoretical and Experimental Physics
Volume2015
Issue number4
DOIs
Publication statusPublished - 2015

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hierarchies
neutrino beams
neutrinos
oscillations
physics
sensitivity
CP violation
muons
protons
evaluation
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Neutrino oscillation physics potential of the T2K experiment. / T2K Collaboration.

In: Progress of Theoretical and Experimental Physics, Vol. 2015, No. 4, 043C01, 2015.

Research output: Contribution to journalArticle

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title = "Neutrino oscillation physics potential of the T2K experiment",
abstract = "The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle Θ13 have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal sin2 2Θ23, the octant of Θ23, and the mass hierarchy, in addition to the measurements of δCP, sin2 Θ23, and Δm232, for various combinations of ν-mode and ν-mode data-taking. With an exposure of 7.8 × 1021 protons-on-target, T2K can achieve 1 σ resolution of 0.050 (0.054) on sin2 Θ23 and 0.040 (0.045) × 10-3 eV2 on Δm232 for 100{\%} (50{\%}) neutrino beam mode running assuming sin2 Θ23 = 0.5 and Δm232 = 2.4 × 10-3 eV2. T2K will have sensitivity to the CP-violating phase δCP at 90{\%} C.L. or better over a significant range. For example, if sin2 2Θ23 is maximal (i.e. Θ23 = 45°) the range is -115° <δCP <-60° for normal hierarchy and +50° <δCP <+130° for inverted hierarchy. When T2K data is combined with data from the NOνA experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero δCP is substantially increased compared to if each experiment is analyzed alone.",
author = "{T2K Collaboration} and K. Abe and J. Adam and H. Aihara and T. Akiri and C. Andreopoulos and S. Aoki and A. Ariga and S. Assylbekov and D. Autiero and M. Barbi and Barker, {G. J.} and G. Barr and P. Bartet-Friburg and M. Bass and M. Batkiewicz and F. Bay and V. Berardi and Berger, {B. E.} and S. Berkman and S. Bhadra and Blaszczyk, {F. D M} and A. Blondel and C. Bojechko and S. Bordoni and Boyd, {S. B.} and D. Brailsford and A. Bravar and C. Bronner and N. Buchanan and Calland, {R. G.} and {Caravaca Rodr{\'i}guez}, J. and Cartwright, {S. L.} and R. Castillo and Catanesi, {M. G.} and A. Cervera and D. Cherdack and G. Christodoulou and A. Clifton and J. Coleman and Coleman, {S. J.} and G. Collazuol and K. Connolly and L. Cremonesi and A. Dabrowska and I. Danko and R. Das and S. Davis and {De Perio}, P. and {De Rosa}, G. and Yusuke Koshio",
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AU - T2K Collaboration

AU - Abe, K.

AU - Adam, J.

AU - Aihara, H.

AU - Akiri, T.

AU - Andreopoulos, C.

AU - Aoki, S.

AU - Ariga, A.

AU - Assylbekov, S.

AU - Autiero, D.

AU - Barbi, M.

AU - Barker, G. J.

AU - Barr, G.

AU - Bartet-Friburg, P.

AU - Bass, M.

AU - Batkiewicz, M.

AU - Bay, F.

AU - Berardi, V.

AU - Berger, B. E.

AU - Berkman, S.

AU - Bhadra, S.

AU - Blaszczyk, F. D M

AU - Blondel, A.

AU - Bojechko, C.

AU - Bordoni, S.

AU - Boyd, S. B.

AU - Brailsford, D.

AU - Bravar, A.

AU - Bronner, C.

AU - Buchanan, N.

AU - Calland, R. G.

AU - Caravaca Rodríguez, J.

AU - Cartwright, S. L.

AU - Castillo, R.

AU - Catanesi, M. G.

AU - Cervera, A.

AU - Cherdack, D.

AU - Christodoulou, G.

AU - Clifton, A.

AU - Coleman, J.

AU - Coleman, S. J.

AU - Collazuol, G.

AU - Connolly, K.

AU - Cremonesi, L.

AU - Dabrowska, A.

AU - Danko, I.

AU - Das, R.

AU - Davis, S.

AU - De Perio, P.

AU - De Rosa, G.

AU - Koshio, Yusuke

PY - 2015

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N2 - The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle Θ13 have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal sin2 2Θ23, the octant of Θ23, and the mass hierarchy, in addition to the measurements of δCP, sin2 Θ23, and Δm232, for various combinations of ν-mode and ν-mode data-taking. With an exposure of 7.8 × 1021 protons-on-target, T2K can achieve 1 σ resolution of 0.050 (0.054) on sin2 Θ23 and 0.040 (0.045) × 10-3 eV2 on Δm232 for 100% (50%) neutrino beam mode running assuming sin2 Θ23 = 0.5 and Δm232 = 2.4 × 10-3 eV2. T2K will have sensitivity to the CP-violating phase δCP at 90% C.L. or better over a significant range. For example, if sin2 2Θ23 is maximal (i.e. Θ23 = 45°) the range is -115° <δCP <-60° for normal hierarchy and +50° <δCP <+130° for inverted hierarchy. When T2K data is combined with data from the NOνA experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero δCP is substantially increased compared to if each experiment is analyzed alone.

AB - The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle Θ13 have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal sin2 2Θ23, the octant of Θ23, and the mass hierarchy, in addition to the measurements of δCP, sin2 Θ23, and Δm232, for various combinations of ν-mode and ν-mode data-taking. With an exposure of 7.8 × 1021 protons-on-target, T2K can achieve 1 σ resolution of 0.050 (0.054) on sin2 Θ23 and 0.040 (0.045) × 10-3 eV2 on Δm232 for 100% (50%) neutrino beam mode running assuming sin2 Θ23 = 0.5 and Δm232 = 2.4 × 10-3 eV2. T2K will have sensitivity to the CP-violating phase δCP at 90% C.L. or better over a significant range. For example, if sin2 2Θ23 is maximal (i.e. Θ23 = 45°) the range is -115° <δCP <-60° for normal hierarchy and +50° <δCP <+130° for inverted hierarchy. When T2K data is combined with data from the NOνA experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero δCP is substantially increased compared to if each experiment is analyzed alone.

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