Abe, K;
Andreopoulos, C;
Antonova, M;
Aoki, S;
Ariga, A;
Assylbekov, S;
Autiero, D;
... Ichikawa, AK; + view all
(2016)
Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam.
Physical Review Letters
, 116
(18)
, Article 181801. 10.1103/PhysRevLett.116.181801.
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Abstract
T2K reports its first measurements of the parameters governing the disappearance of ν-μ in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic ν-μ beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the ν-μ survival probability is expected to be minimal. Using a data set corresponding to 4.01×1020 protons on target, 34 fully contained μ-like events were observed. The best-fit oscillation parameters are sin2(θ-23)=0.45 and |Δm-322|=2.51×10-3 eV2 with 68% confidence intervals of 0.38-0.64 and 2.26-2.80×10-3 eV2, respectively. These results are in agreement with existing antineutrino parameter measurements and also with the νμ disappearance parameters measured by T2K.
Type: | Article |
---|---|
Title: | Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevLett.116.181801 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.116.181801 |
Language: | English |
Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License (CC BY 3.0) (https://creativecommons.org/licenses/by/3.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
URI: | https://discovery.ucl.ac.uk/id/eprint/1493571 |
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