CHARMED HADRON-PRODUCTION IN PI-P AND KP COLLISIONS AND LEADING PARTICLE EFFECT BY CONSTITUENT QUARK-DIQUARK CASCADE MODEL

We investigate the meson: baryon and anti-baryon productions in pi p a nd Kp collisions in terms of a constituent cascade model which include s charm flavour. The constituent diquark in an incident baryon has a t endency to get a large momentum fraction, resulting in considerable di fference of subenergies for particle productions from quark-diquark an d quark-antiquark chains in a meson-baryon collision. As a consequence , the leading particle effects on D meson productions are expected to be quite different in pi(+) and pi(-) beams at present accelerator ene rgies.