Leading Effects in Hadroproductions of Lambda_c and D From Constituent Quark-Diquark Cascade Picture

Abstract

We discuss the hadroproductions of Lambda_c, Lambda_c bar, D and D bar in the framework of the constituent quark-diquark cascade model taking into account the valence quark annihilation. The spectra of Lambda_c and Lambda_c bar in pA, Sigma^-A and pi^-A collisions are well explained by the model using the values of parameters used in hadroproductions of D and D bar. It is shown that the role of valence diquark in the incident baryon is important for D bar productions as well as for Lambda_c production.

Comments: 11 pages, 5 figures, v2:some explanations added, references added, typos corrected, v3: top margin changed