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arXiv · 1611.02985

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

J. Haidenbauer·G. Krein
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Abstract

Cross sections for the charm-production reactions $\bar p p \to \bar Λ_c^- Σ_c^+$, $\bar Σ_cΣ_c$, $\bar Ξ_cΞ_c$, and $\bar Ξ_c'Ξ_c'$ 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 $\bar p p \to \bar ΛΣ$, $\bar ΣΣ$, $\bar ΞΞ$ by connecting the two sectors via SU(4) flavor symmetry. The cross sections are found to be in the order of $0.1 - 1$ $μb$ 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 $D^*$ 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.

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J. Haidenbauer, G. Krein. 2016-11-08. Production of charmed baryons in $\bar p p$ collisions close to their thresholds. https://doi.org/10.1103/physrevd.95.014017

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