NEUTRINO PRODUCTION OF DIMUONS AT THE FERMILAB TEVATRON

Neutrino and antineutrino interactions with two muons in the final sta te have been studied by the CCFR collaboration in the Fermilab Tevatro n neutrino beam. The rate of neutrino- and antineutrino-induced prompt same-sign dimuon production in steel was measured using a sample of 2 20 mu- mu- events and 15 mu+ mu+ events with P(mu) > 9 GeV/c, and ener gies between 30 GeV and 600 GeV. After background subtraction, the pro mpt rate of same-sign dimuon production is (0.53 +/- 0.24) x 10(-4) pe r nu(mu) charged-current event and (0.52 +/- 0.33) x 10(-4) per nu(mu) BAR charged-current event. After demanding P(nu)1 greater-than-or-equa l-to 9 Gev/c, P(mu)2 greater-than-or-equal-to 5 GeV/c and 30 less-than -or-equal-to E(nu) less-than-or-equal-to 600 GeV a sample of 5044 nu(m u) 1062 nu(mu)BAR induced mu+/- mu+/- events are observed. The data su pport the slow rescaling model of charm production with a value of m(c ) = 1.31 +/-.24 GeV/c2. The CKM matrix element V(cd)=.209+/-0.012 and the nucleon strangeness content, eta(s)=.064(-0.0065)+0.0075 are measu red with the strange sea x distribution found to be softer than its no n-strange counterpart. The first measurements of the Q2 dependence of the strange quark densities, xs(x), are also presented.