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.

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

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