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 sigma(v -> ..mu../sup -/c)/sigma(v -> ..mu../sup -/) = 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 sigma(v -> ..mu..canti c)/sigma(v -> ..mu..c) < 6% (90% CL) is found for the ratio of charged current pair and single charm production.
Ushida, N;  Kondo, T;  Fujioka, G; Fukushima, J; Takahashi, Y; Tatsumi, S; Yokoyama, C;  Homma, Y; Tsuzuki, Y;  Bahk, S
- Aichi Univ. of Education, Kariya (Japan). Dept. of Physics
- Fermi National Accelerator Lab., Batavia, IL (USA)
- Kobe Univ. (Japan). Dept. of Physics
- Kobe Univ. (Japan). Coll. of Liberal Arts