Production of charmed baryons in $\bar{p}p$ collisions close to their thresholds

Abstract

Cross sections for the charm-production reactions $\bar{p}p\to {\bar{\Lambda }}_c^{-}{\Sigma }_c^{+}$, ${\bar{\Sigma }}_c{\Sigma }_c$, ${\bar{\Xi }}_c{\Xi }_c$, and ${\bar{\Xi }}_c^{\prime }{\Xi }_c^{\prime }$ are presented, for energies near their respective thresholds. The results are based on a calculation performed in the meson-exchange framework in close analogy to earlier studies of the Jülich group on the strangeness-production reactions $\bar{p}p\to \bar{\Lambda }\Sigma$, $\bar{\Sigma }\Sigma$, $\bar{\Xi }\Xi$ by connecting the two sectors via SU(4) flavor symmetry. The cross sections are found to be in the order of $0.1-1$ $\mu b$ at energies of $100$ MeV above the respective thresholds, for all considered channels. Complementary to meson-exchange, where the charmed baryons are produced by the exchange of $D$ and $D^{\ast }$ mesons, a charm-production potential derived in a quark model is employed for assessing uncertainties. The cross sections predicted within that picture turned out to be significantly smaller.

17 pages, 7 figures

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Cited by in corpus (6)

• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• Production of charmed baryon ${\Lambda }_c(2860)$ via low energy antiproton-proton interaction
• Studying ${\Lambda }^{\ast }$ resonances in the $p\bar{p}\to \Lambda \bar{\Lambda }\eta$ reaction
• Production of single-charmed baryons in a quark model approach
• A perturbative QCD approach to ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$
• Estimation of coupling constants for D-meson, charmed, and light baryons in effective Lagrangian approach and quark model