Λ + c − Λ − c production asymmetries in two component models

Experiments on charm hadroproduction have shown a substantial difference in the production of charm and anticharm hadrons. In this work we study Λ+ c and Λ c inclusive production in p−N interactions in the framework of two component models. We show that the recombination two component model gives a qualitatively and quantitatively good description of Λ c production while the intrinsic charm model seems to be ruled out by recent experimental data from the SELEX Collaboration. It is well known from experiments that there is a substantial difference in the production of charm and anticharm hadrons in hadron-hadron interactions. Leading (L) particles, which share one or more valence quarks with the initial hadrons, are favored in the incident hadron direction over NonLeading (NL) particles, which share none. This effect, known as Leading Particle Effect, has been observed in inclusive production of charm mesons and baryons in π −N , p−N , K − N and Σ −N interactions by several experiments [1, 2, 3] . Leading particle effects can be quantified by means of a production asymmetry, which is defined as A ≡ dσ L − dσ dσL + dσNL . (1) ∗[email protected]