Search for (Sigma)(sub c) (yields) (Lambda)(sub c)(pi) using (Lambda)(sub c) (yields) (Sigma)(sub s)(pi)(pi) in 250 GeV (pi)(sup (minus))-nucleon interactions

摘要

Combined cross section times branching fraction limits are given for (Sigma)(sub c)(sup +)(sup +) (r arrow) (Lambda)(sub c)(sup +)(pi)(sup +) and (Sigma)(sub c)(sup 0) (r arrow) (Lambda)(sub c)(sup +)(pi)(sup (minus)) where (Lambda)(sub c)(sup +) (r arrow) (Sigma)(sub s)(sup (plus minus))(pi)(sup (plus minus))(pi)(sup +). The (Lambda)(sub c)(sup +) is reconstructed with partial information on the (Sigma)(sub s); the missing (Sigma)(sub s) momentum is established through momentum conservation imposed by a constrained fit. The data are of (pi)(sup (minus)) beam interactions at 250 GeV from Fermilab experiment E769.