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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 ν̄μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν̄μ events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm⊃̄2|=[3.36-0.40+0.46(stat)±0.06(syst)] ×10⊃-3eV2, ⊃sin⊃2(2θ̄)=0.86-0.12+0.11(stat) ±0....

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Journal:
Physical Review Letters
Volume:
107
Issue:
2
Publication date:
2011-07-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:386aceb2-9f23-4447-8ccd-c1193f219785
Source identifiers:
172488
Local pid:
pubs:172488
Language:
English

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