TY  - JOUR
AU  - T2K Collaboration (Abe, K. et al
AU  - Cervera-Villanueva, A.
AU  - Escudero, L.
AU  - Gomez-Cadenas, J. J.
AU  - Izmaylov, A.
AU  - Monfregola, L.
AU  - Sorel, M.
AU  - Stamoulis, P.
PY  - 2013
DA  - 2013//
TI  - Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-Axis Beam
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 211803
EP  - 7pp
VL  - 111
IS  - 21
PB  - Amer Physical Soc
AB  - The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01 x 10(20) protons on target. In the absence of neutrino oscillations, 205 +/- 17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin(2) (theta(23)) = 0.514 +/- 0.082 and mass splitting vertical bar Delta m(32)(2)vertical bar = 2.44(-0.15)(+0.17) x 10(-3) eV(2)/c(4). Our result corresponds to the maximal oscillation disappearance probability.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1308.0465
UR  - https://doi.org/10.1103/PhysRevLett.111.211803
DO  - 10.1103/PhysRevLett.111.211803
LA  - English
N1  - WOS:000327245600004
ID  - T2KCollaborationAbe_etal2013
ER  -