Rights statement: © 2012 American Physical Society
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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 - First muon-neutrino disappearance study with an off-axis beam
AU - Abe, K.
AU - Abgrall, N.
AU - Ajima, Y.
AU - Aihara, H.
AU - Albert, J. B.
AU - Andreopoulos, C.
AU - Andrieu, B.
AU - Anerella, M. D.
AU - Aoki, S.
AU - Araoka, O.
AU - Argyriades, J.
AU - Ariga, A.
AU - Ariga, T.
AU - Assylbekov, S.
AU - Autiero, D.
AU - Badertscher, A.
AU - Barbi, M.
AU - Barker, G. J.
AU - Barr, G.
AU - Bass, M.
AU - Batkiewicz, M.
AU - Bay, F.
AU - Bentham, S.
AU - Berardi, V.
AU - Berger, B. E.
AU - Bertram, I.
AU - Besnier, M.
AU - Beucher, J.
AU - Beznosko, D.
AU - Bhadra, S.
AU - Blaszczyk, F. d. M.
AU - Blocki, J.
AU - Blondel, A.
AU - Bojechko, C.
AU - Bouchez, J.
AU - Boyd, S. B.
AU - Bravar, A.
AU - Bronner, C.
AU - Brook-Roberge, D. G.
AU - Buchanan, N.
AU - Budd, H.
AU - Calland, R.
AU - Davies, G. S.
AU - Dealtry, Thomas
AU - Finch, A. J.
AU - Grant, N.
AU - Hatzikoutelis, A.
AU - Kormos, L. L.
AU - Lawe, M.
AU - Nowak, J. A.
AU - Ratoff, P. N.
AU - T2K Collaboration
N1 - © 2012 American Physical Society
PY - 2012/2/22
Y1 - 2012/2/22
N2 - We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 x 10(20) protons on target, we observe 31 fully-contained single mu-like ring events in Super-Kamiokande, compared with an expectation of 104 +/- 14 (syst) events without neutrino oscillations. The best-fit point for two-flavor nu(mu) -> nu(tau) oscillations is sin(2)(2 theta(23)) = 0.98 and vertical bar Delta m(32)(2)vertical bar = 2.65 x 10(-3) eV(2). The boundary of the 90% confidence region includes the points sin(2)(2 theta(23)), vertical bar Delta m(32)(2)vertical bar = (1.0, 3.1 x 10(-3) eV(2)), (0.84, 2.65 x 10(-3) eV(2)) and (1.0, 2.2 x 10(-3) eV(2)).
AB - We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 x 10(20) protons on target, we observe 31 fully-contained single mu-like ring events in Super-Kamiokande, compared with an expectation of 104 +/- 14 (syst) events without neutrino oscillations. The best-fit point for two-flavor nu(mu) -> nu(tau) oscillations is sin(2)(2 theta(23)) = 0.98 and vertical bar Delta m(32)(2)vertical bar = 2.65 x 10(-3) eV(2). The boundary of the 90% confidence region includes the points sin(2)(2 theta(23)), vertical bar Delta m(32)(2)vertical bar = (1.0, 3.1 x 10(-3) eV(2)), (0.84, 2.65 x 10(-3) eV(2)) and (1.0, 2.2 x 10(-3) eV(2)).
UR - http://www.scopus.com/inward/record.url?scp=84861903697&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.85.031103
DO - 10.1103/PhysRevD.85.031103
M3 - Journal article
VL - 85
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 3
M1 - 031103
ER -