Search For Pi(0)->Nu(Mu)(Nu)Over-Bar(Mu) Decays In The Lsnd Detector

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(mu) and/or (nu) over bar (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) over bar (mu), we set a direct upper limit for this branching ratio of Gamma(pi(0)-->nu(mu)(nu) over bar (mu))/Gamma(pi(0)-->all)<1.6x10(-6) at 90% confidence level.