TY  - JOUR
AU  - T2K Collaboration (Abe, K. et al
AU  - Cervera-Villanueva, A.
AU  - Izmaylov, A.
AU  - Sorel, M.
AU  - Stamoulis, P.
PY  - 2016
DA  - 2016//
TI  - Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 181801
EP  - 8pp
VL  - 116
IS  - 18
PB  - Amer Physical Soc
AB  - T2K reports its first measurements of the parameters governing the disappearance of (nu) over bar μin an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic (nu) over bar μbeam, produced with a peak energy of 0.6 GeVat J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the (nu) over bar μsurvival probability is expected to be minimal. Using a data set corresponding to 4.01 x 10(20) protons on target, 34 fully contained mu-like events were observed. The best-fit oscillation parameters are sin(2) ((theta) over bar (23)) = 0.45 and vertical bar Delta(m) over bar (2)(32)vertical bar = 2.51 x 10(-3) eV(2) with 68% confidence intervals of 0.38-0.64 and 2.26-2.80 x 10(-3) eV(2), respectively. These results are in agreement with existing antineutrino parameter measurements and also with the nu(mu) disappearance parameters measured by T2K.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1512.02495
UR  - https://doi.org/10.1103/PhysRevLett.116.181801
DO  - 10.1103/PhysRevLett.116.181801
LA  - English
N1  - WOS:000375669300003
ID  - T2KCollaborationAbe_etal2016
ER  -