Rights statement: © 2014 American Physical Society
Final published version, 336 KB, PDF document
Rights statement: © 2014 American Physical Society
Final published version, 336 KB, PDF document
Final published version
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Precise Measurement of the Neutrino Mixing Parameter θ_{23} from Muon Neutrino Disappearance in an Off-axis Beam
AU - Abe, K.
AU - Adam, J.
AU - Aihara, H.
AU - Akiri, T.
AU - Andreopoulos, C.
AU - Aoki, S.
AU - Ariga, A.
AU - Ariga, T.
AU - Assylbekov, S.
AU - Autiero, D.
AU - Barbi, M.
AU - Barker, G. J.
AU - Barr, G.
AU - Bass, M.
AU - Batkiewicz, M.
AU - Bay, F.
AU - Bentham, S. W.
AU - Berardi, V.
AU - Berger, B. E.
AU - Berkman, S.
AU - Bertram, I.
AU - Bhadra, S.
AU - Blaszczyk, F. d. M.
AU - Blondel, A.
AU - Bojechko, C.
AU - Bordoni, S.
AU - Boyd, S. B.
AU - Brailsford, Dominic
AU - Bravar, A.
AU - Bronner, C.
AU - Buchanan, N.
AU - Calland, R. G.
AU - Caravaca Rodriguez, 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 - Dealtry, Thomas
AU - Finch, A. J.
AU - Grant, N.
AU - Kormos, L. L.
AU - Lamont, I.
AU - O'Keeffe, H. M.
AU - Ratoff, P. N.
AU - Reeves, M.
AU - Southwell, L.
AU - T2K Collaboration
N1 - © 2014 American Physical Society 8 pages, 4 figures. Final version as published in PRL, with very minor changes from initial version in response to referee comments
PY - 2014/5/8
Y1 - 2014/5/8
N2 - New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter theta_{23}. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57 x 10^{20} protons on target, T2K has fit the energy-dependent nu_mu oscillation probability to determine oscillation parameters. Marginalizing over the values of other oscillation parameters yields sin^2 (theta_{23}) = 0.514 +0.055/-0.056 (0.511 +- 0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Delta m^2_{32} = (2.51 +- 0.10) x 10^{-3} eV^2/c^4 (inverted hierarchy: Delta m^2_{13} = (2.48 +- 0.10) x 10^{-3} eV^2/c^4). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty.
AB - New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter theta_{23}. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57 x 10^{20} protons on target, T2K has fit the energy-dependent nu_mu oscillation probability to determine oscillation parameters. Marginalizing over the values of other oscillation parameters yields sin^2 (theta_{23}) = 0.514 +0.055/-0.056 (0.511 +- 0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Delta m^2_{32} = (2.51 +- 0.10) x 10^{-3} eV^2/c^4 (inverted hierarchy: Delta m^2_{13} = (2.48 +- 0.10) x 10^{-3} eV^2/c^4). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty.
KW - SCATTERING
KW - DETECTOR
KW - SYMMETRIES
KW - PHYSICS
KW - MODELS
KW - MASS
U2 - 10.1103/PhysRevLett.112.181801
DO - 10.1103/PhysRevLett.112.181801
M3 - Journal article
VL - 112
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 18
M1 - 181801
ER -