Cross sections for charm production by neutrinos

Abstract The production of charmed particles has been measured using a hybrid emulsion spectrometer in the Fermilab wide-band neutrino beam. The relative cross section for charged current charmed particle production is σ ( v → μ − c)/ σ ( v → μ − ) = 6.5 ± 1.9 1.8 %, and the energy dependence of the cross section is presented. One event with charm pair production was observed. A limit of σ(v → μ c c )/σ(v → μ c ) CL ) is found for the ratio of charged current pair and single charm production.