Exclusive charm production in pbar p collisions at s^1/2 <15 GeV

Abstract

We discuss the open charm production in peripheral reactions $\bar{p}p\to {\bar{Y}}_c{Y}_c$ and $\bar{p}p\to M_c{\bar{M}}_c$, where $Y_c$ and $M_c$ stand for ${\Lambda }_c^{+},{\Sigma }_c^{+}$ and $D,D^{\ast }$, respectively, at $\sqrt{s}\lesssim 15$ GeV, which corresponds to the energy range of FAIR. Our consideration is based on the topological decomposition of the planar quark and diquark diagrams which allows to estimate consistently meson and baryon exchange trajectories and energy scale parameters as well. The spin dependence is determined by the effective interaction of lowest exchanged resonance. Unknown parameters are fixed by an independent analysis of open strangeness production in $\bar{p}p\to \bar{Y}Y$ and $\bar{p}p\to \bar{K}K$ reactions and of SU(4) symmetry. We present the corresponding cross sections and longitudinal double-spin asymmetries for exclusive binary reactions with open charm mesons and baryons in the final state. The polarization observables have a non-trivial $t$ and $s$ dependence which is sensitive to details of the open charm production mechanism.

26 pages, 18 figures

References in corpus (4)

• Charmed-Meson Fragmentation Functions with Finite-Mass Corrections
• The total charm cross section
• Charmonium dynamics in nucleus-nucleus collisions at SPS and FAIR energies
• Prospects of Open Charm Production at GSI-FAIR and J-PARC

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• Production of charmed baryons in $\bar{p}p$ collisions close to their thresholds
• Possible ${\Lambda }_c{\bar{\Lambda }}_c$ molecular states and their productions in nulceon-antinulceon collision
• $K^0\Lambda$ and $D^{-}{\Lambda }_c^{+}$ production induced by pion beams off the nucleon
• Charm production in antiproton-proton annihilation
• $\bar{D}D$ meson pair production in antiproton-nucleus collisions
• The $\psi$(3770) resonance and its production in $\bar{p}p\to D\bar{D}$
• Double-strangeness exchange reactions in a hybrid Regge-plus-resonance approach
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• Parton Model Calculation of Inclusive Charm Production by a Low-energy Antiproton Beam
• Estimation of coupling constants for D-meson, charmed, and light baryons in effective Lagrangian approach and quark model
• A perturbative QCD approach to ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$