Home > Research > Publications & Outputs > Measurement of muon antineutrino oscillations w...

Electronic data

  • main

    Accepted author manuscript, 404 KB, PDF document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

  • PhysRevLett.116.181801

    Rights statement: This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Published by the American Physical Society

    Final published version, 1.08 MB, PDF document

    Available under license: CC BY

Links

Text available via DOI:

Keywords

View graph of relations

Measurement of muon antineutrino oscillations with an accelerator-produced off-axis beam

Research output: Contribution to journalJournal article

Published
  • T2K Collaboration
Close
Article number181801
<mark>Journal publication date</mark>5/05/2016
<mark>Journal</mark>Physical review letters
Issue number18
Volume116
Number of pages8
Publication StatusPublished
<mark>Original language</mark>English

Abstract

T2K reports its first measurements of the parameters governing the disappearance of $\overline{\nu}_\mu$ in an off-axis beam due to flavour change induced by neutrino oscillations. The quasi-monochromatic $\overline{\nu}_\mu$ 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 $\overline{\nu}_\mu$ survival probability is expected to be minimal. Using a dataset corresponding to $4.01 \times 10^{20}$ protons on target, $34$ fully contained $\mu$-like events were observed. The best-fit oscillation parameters are: $\sin^2 (\overline{\theta}_{23}) = 0.45$ and $|\Delta\overline{m}^2_{32}| = 2.51 \times 10^{-3}$ eV$^2$ with 68% confidence intervals of 0.38 - 0.64 and 2.26 - 2.80 ($\times 10^{-3}$ eV$^2$) respectively. These world-leading results are in agreement with existing anti-neutrino parameter measurements and also with the $\nu_\mu$ disappearance parameters measured by T2K.

Bibliographic note

8 pages, 4 figures