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 $D$, $D_s$, ${\Lambda }_c$, ${\Xi }_c$, ${\Omega }_c$ in hadron--hadron collisions taking into account the decays of $S$--wave resonances like $D^{\ast }$, $D_s^{\ast }$, ${\Sigma }_c$, ${\Sigma }_c^{\ast }$, ${\Xi }_c^{\ast }$, ${\Xi }_c^{\prime }$, and ${\Omega }_c^{\ast }$. We describe the bulk of the existing data on $D$, $D^{\ast }$, and ${\Lambda }_c$ production in $\pi p$ and $pp$ collisions and predict the yield of charmed particles in ${\Sigma }^{-}p$ and ${\Xi }^{-}p$ reactions at hyperon beam energies of $340GeV/c$ and $600GeV/c$. 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.

Comments: Latex,19 pages, 12figs. can be received by request