Measurement of Rates for Muonless Deep Inelastic Neutrino and Antineutrino Interactions

Relative rates for deep inelastic neutrino and antineutrino scattering without a finalstate muon have been measured. For neutrinos the result is ${R}^{{ν}}={{σ}({{ν}}_{{μ}}+nucleon{→}{{ν}}_{{μ}}+hadrons)}{{σ}({{ν}}_{{μ}}+nucleon{→}{{μ}}^{{-}}+hadrons)}=0.11±{}0.05$. The corresponding ratio for antineutrinos is ${R}^{{{ν}}}=0.32±{}0.09$.