Neutrino production of dimuons
0103 physical sciences
01 natural sciences
DOI:
10.1007/bf01548260
Publication Date:
2005-04-20T18:21:54Z
AUTHORS (40)
ABSTRACT
Neutrino interactions with two muons in the final state have been studied using the Fermilab narrow band beam. A sample of 18v μ like sign dimuon events withP μ>9 GeV/c yields 6.6±4.8 events after backgroud subtraction and a prompt rate of (1.0±0.7)×10−4 per single muon event. The kinematics of these events are compared with those of the non-prompt sources. A total of 437v μ and 31 $$\bar v_\mu $$ opposite sign dimuon events withP μ>4.3 GeV/c are used to measure the strange quark content of the nucleon: $$\kappa = {{2s} \mathord{\left/ {\vphantom {{2s} {\left( {\bar u + \bar d} \right) = 0.52_{ - 0.15}^{ + 0.17} \left( {or\eta _s \frac{{2s}}{{u + d}} = 0.075 \pm 0.019} \right) for 100< E_v< 230 GeV\left( {\left\langle {Q^2 } \right\rangle = {{23 GeV^2 } \mathord{\left/ {\vphantom {{23 GeV^2 } {c^2 }}} \right. \kern-\nulldelimiterspace} {c^2 }}} \right)}}} \right. \kern-\nulldelimiterspace} {\left( {\bar u + \bar d} \right) = 0.52_{ - 0.15}^{ + 0.17} \left( {or\eta _s \frac{{2s}}{{u + d}} = 0.075 \pm 0.019} \right) for 100< E_v< 230 GeV\left( {\left\langle {Q^2 } \right\rangle = {{23 GeV^2 } \mathord{\left/ {\vphantom {{23 GeV^2 } {c^2 }}} \right. \kern-\nulldelimiterspace} {c^2 }}} \right)}}$$ using a charm semileptonic branching ratio of (10.9±1.4)% extracted from measurements ine + e − collisions and neutrino emulsion data.
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