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

الأصل · EN

We study the productions of charmed baryons Λc- Λc+, Λc- Σc+, and Σ- Σc+ 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 D⁰ and D*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*⁰ meson-exchange diagrams. We discuss the relative roles of tensor and vector components of the D*⁰ coupling in the D*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 PANDA experiment.