First direct observation of muon antineutrino disappearance

Adamson, P. and Nowak, Jaroslaw (2011) First direct observation of muon antineutrino disappearance. Physical review letters, 107 (2). ISSN 1079-7114

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Abstract

This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν̅ μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν̅ μ events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm̅ 2|=[3.36-0.40+0.46(stat)±0.06(syst)]×10-3  eV2, sin⁡2(2θ̅ )=0.86-0.12+0.11(stat)±0.01(syst). The MINOS νμ and ν̅ μ measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Additional Information: © 2011 American Physical Society
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 66777
Deposited By: ep_importer_pure
Deposited On: 26 Sep 2013 10:52
Refereed?: Yes
Published?: Published
Last Modified: 20 Feb 2020 01:49
URI: https://eprints.lancs.ac.uk/id/eprint/66777

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