{"paper":{"title":"Search for $\\pi^0 \\to \\nu_{\\mu}\\bar\\nu_{\\mu}$ Decay in LSND","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.K. Cochran, A. Malik, A.R. Fazely, D.H. White, D.O. Caldwell, D. Rupnik, D. Smith, E.D. Church, G.B. Mills, G.J. VanDalen, G. Kahrimanis, G.T. Garvey, H. Yi, I. Stancu, J.B. Donahue, K.L. McIlhany, L.B. Auerbach, M. Sung, N. Wadia, R.F. Somodi, R.L. Burman, R.L. Imlay, R. Majkic, R.M. Gunasingha, R. Tayloe, S. Yellin, V.D. Sandberg, W.C. Louis, W.D. Strossman, W.J. Metcalf, W. Vernon","submitted_at":"2003-10-30T20:28:50Z","abstract_excerpt":"We observe a net beam-excess of $8.7 \\pm 6.3$ (stat) $\\pm 2.4$ (syst) events, above 160 MeV, resulting from the charged-current reaction of $\\nu_{\\mu}$ and/or $\\bar\\nu_{\\mu}$ on C and H in the LSND detector. No beam related muon background is expected in this energy regime. Within an analysis framework of $\\pi^0 \\to \\nu_{\\mu}\\bar\\nu_{\\mu}$, we set a direct upper limit for this branching ratio of $\\Gamma(\\pi^0 \\to \\nu_\\mu \\bar\\nu_\\mu) / \\Gamma(\\pi^0 \\to all) < 1.6 \\times 10^{-6}$ at 90% confidence level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0310060","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}