Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam



Abe, K, Andreopoulos, C ORCID: 0000-0003-2020-8215, Antonova, M, Aoki, S, Ariga, A, Assylbekov, S, Autiero, D, Barbi, M, Barker, GJ, Barr, G
et al (show 319 more authors) (2016) Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam. PHYSICAL REVIEW LETTERS, 116 (18).

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Abstract

T2K reports its first measurements of the parameters governing the disappearance of ¯νμ in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic ¯νμ 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 ¯νμ 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(¯θ23)=0.45 and |Δ¯m232|=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.

Item Type: Article
Uncontrolled Keywords: Collimation, Neutrino oscillations, Particle prodcution, Neutrino detectors
Depositing User: Symplectic Admin
Date Deposited: 20 Jun 2016 11:17
Last Modified: 09 Oct 2021 07:39
DOI: 10.1103/PhysRevLett.116.181801
Open Access URL: https://journals.aps.org/prl/pdf/10.1103/PhysRevLe...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3001766