CERN experiment WA89 has studied charmed particles produced by a Sigma^- beam at 340 GeV/c on nuclear targets. Production of particles which have light quarks in common with the beam is compared to production of those which do not. Considerable production asymmetries between D^- and D^p, D_s^ and D_s^+ and Lambda_c and Antilambda_c are observed. The results are compared with pion beam data and with theoretical calculations.
The expectation values, and the lower limits, of the measured asymmetries between D+ and D- production. Statistical errors only are presented.
The expectation values, and the lower limits, of the measured asymmetries between D/S+ and D/S- production. Statistical errors only are presented.
The expectation values, and the lower limits, of the measured asymmetries between LAMBDA/C+ and LAMBDA/CBAR- production. Statistical errors only are presented.