Measurement Of The Muon-neutrino And Anti-muon-neutrino - Nucleon Charged Current Total Cross-sections, And The Ratio Of Muon-neutrino Neutron To Muon-neutrino Proton Charged Current Total Cross-section

The total ν_μ and ν_μ nucleon charged-current cross sections have been measured in BEBC filled with deuterium and exposed to the wide-band neutrino and antineutrino beams at the CERN-SPS. Assuming a linear energy dependence for the cross sections, σ = aE(-_ν, we obtained the coefficients a_{νN = 0.62 ± 0.05 and aνN = 0.33 ± 0.03} (in units of 10^-38 cm²/GeV), where the quoted error is mainly systematic. The ratio of the cross sections is σ_νN/σ_νN = 0.53 ± 0.03. We also determined the ratio of the charged-current cross section for neutrino interactions on neutrons and protons R = σ_νn/σ_νp = 2.10 ± 0.08 (statistical) ±0.22 (sysetmatic). The dependence of R on the variables x, y and E_ν is discussed.