Inverse muon decay and neutrino dimuon production at the Tevatron

Abstract We report on two recent measurements by the CCFR collaboration using the Fermilab Tevatron quad-triplet neutrino beam with neutrino energies up to 600 GeV. In a sample of 666,000 neutrino and 132,000 antineutrino events, 1151 inverse μ-decay events νμe− → μ−νe, were isolated corresponding to a rate with respect to ν μ-N charged current interactions of (0.125±.009 (stat.) ± .003 (sys.)) × 10−2. The data also contain 1522 νμ and 275 ν μ induced opposite sign dimuon events which are due predominantly to charm production at the hadronic vertex. Using this sample, we have measured the strange sea content of the nucleon, ηs = ∫ dχ(2χs(χ))/ ∫ dχ(χu(χ) + χd(χ)) = .057−0.008+0.012, the Cabbibo-KObayashi-Maskawa matrix element, |Vcd| = 0.220−.015+.018, and the slow-rescaling model charm mass parameter, mc = 1.3−0.5+0.6GeV. 0868