%0 Journal Article
%T Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam
%A T2K Collaboration (Abe, K. et al
%A Cervera-Villanueva, A.
%A Izmaylov, A.
%A Sorel, M.
%A Stamoulis, P.
%J Physical Review Letters
%D 2016
%V 116
%N 18
%I Amer Physical Soc
%@ 0031-9007
%G English
%F T2KCollaborationAbe_etal2016
%O WOS:000375669300003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2666), last updated on Fri, 03 Jun 2016 18:48:22 +0000
%X 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.
%R 10.1103/PhysRevLett.116.181801
%U http://arxiv.org/abs/1512.02495
%U https://doi.org/10.1103/PhysRevLett.116.181801
%P 181801-8pp