Charmed particle production in hadron-hadron collision

Abstract

In the framework of Quark--Gluon--String Model developed recently in ITEP we calculate spectra of charmed particles $D$, $D_s$, $Λ_c$, $Ξ_c$, $Ω_c$ in hadron--hadron collisions taking into account the decays of $S$--wave resonances like $D^*$, $D^*_s$, $Σ_c$, $Σ^*_c$, $Ξ^*_c$, $Ξ'_c$, and $Ω^*_c$. We describe the bulk of the existing data on $D$, $D^*$, and $Λ_c$ production in $πp$ and $pp$ collisions and predict the yield of charmed particles in $Σ^-p$ and $Ξ^-p$ reactions at hyperon beam energies of $340\;GeV/c$ and $600\;GeV/c$. Because of significant production of baryon resonances our predictions for unfavored fragmentation differ from predictions of other models which do not take resonance production into account.