Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model

Abstract

We study the productions of charmed baryons ${\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$, ${\bar{\Lambda }}_c^{-}{\Sigma }_c^{+}$, and ${\bar{\Sigma }}^{-}{\Sigma }_c^{+}$ in the antiproton-proton collisions within an effective Lagrangian model that has only the baryon-meson degrees of freedom and involves the physical hadron masses. The baryon production proceeds via the $t$-channel exchanges of $D^0$ and $D^{\ast 0}$ mesons in the initial collision of the antiproton with the target proton. The distortion effects in the initial and final states are accounted for by using an eikonal approximation-based procedure. We find that the reaction amplitudes of all the production channels are dominated by the $D^{\ast 0}$ meson-exchange diagrams. We discuss the relative roles of tensor and vector components of the $D^{\ast 0}$ coupling in the $D^{\ast 0}$ meson-exchange component of the total production cross sections. The magnitudes of the cross sections are predicted for each final state for the range of beam momenta of relevance to the $\bar{P}ANDA$ experiment.

arXiv comment16 pages, 5 figures. typos corrected, version accepted for publication in Phys. Rev. D. arXiv admin note: text overlap with arXiv:1406.7071

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Cited by in corpus (3)

• Production of charmed baryon ${\Lambda }_c(2860)$ via low energy antiproton-proton interaction
• Charm production in interactions of antiproton with proton and nuclei at $\bar{P}ANDA$ energies
• Production of single-charmed baryons in a quark model approach