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Search for pi(0)-->nu(mu)nu(mu) decays in the LSND detector |
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| Authors: | Auerbach L B Burman R L Caldwell D O Church E D Cochran A K Donahue J B Fazely A R Garvey G T Gunasingha R M Imlay R L Kahrimanis G Louis W C Majkic R Malik A McIlhany K L Metcalf W J Mills G B Rupnik D Sandberg V D Smith D Somodi R F Stancu I Strossman W D Sung M Tayloe R VanDalen G J Vernon W Wadia N White D H Yellin S Yi H;LSND Collaboration |
| Institution: | Temple University, Philadelphia, Pennsylvania 19122, USA. |
| Abstract: | 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 nu(micro) and/or nu;(mu) on C and H in the LSND detector. No beam-related muon background is expected in this energy regime. Within an analysis framework of pi(0)-->nu(mu)nu;(mu), we set a direct upper limit for this branching ratio of Gamma(pi(0)-->nu(mu)nu;(mu))/Gamma(pi(0)-->all)<1.6 x 10(-6) at 90% confidence level. |
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