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First direct observation of muon antineutrino disappearance.

Abstract:

This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν(μ) production, accumulating an exposure of 1.71 × 10²⁰ protons on target. In the Far Detector, 97 charged current ν(μ) events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm²| = [3.36(-0.40)(+0.46)(stat) ± 0.06(syst)] × 10⁻³ eV², sin²(2θ) = 0.86(-0.12)(+0...

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Publication status:
Published

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Journal:
Physical review letters
Volume:
107
Issue:
2
Pages:
021801
Publication date:
2011-07-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:12eb80e1-cd1c-4fb1-8273-ee8506c141d9
Source identifiers:
166569
Local pid:
pubs:166569
Language:
English
Keywords:

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