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Phys. Rev. Lett. 92, 091801 (2004) [4 pages]

Search for π0νμν̅ μ Decays in the LSND Detector

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L. B. Auerbach et al. LSND Collaboration
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Received 30 October 2003; published 4 March 2004

We observe a net beam excess of 8.7±6.3(stat)±2.4(syst) events, above 160 MeV, resulting from the charged-current reaction of νμ and/or ν̅ μ on C and H in the LSND detector. No beam-related muon background is expected in this energy regime. Within an analysis framework of π0νμν̅ μ, we set a direct upper limit for this branching ratio of Γ(π0νμν̅ μ)/Γ(π0→all)<1.6×10-6 at 90% confidence level.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.091801
DOI:
10.1103/PhysRevLett.92.091801
PACS:
13.20.Cz, 14.40.Aq, 14.60.St