Charm production in interactions of antiproton with proton and nuclei at ${\bar P}ANDA$ energies

TL;DR

This paper models charm baryon production in antiproton-proton and antiproton-nucleus collisions at energies relevant to the ${ar P}ANDA$ experiment, predicting cross sections and hypernuclear formation probabilities.

Contribution

It introduces a covariant effective Lagrangian model for charm production and explores hypernuclear formation in antiproton interactions, providing new theoretical predictions.

Findings

Differential cross sections for charm baryon production are in the range of a few microbarns per steradian.

Predicted formation of charm hypernuclei with specific particle-hole configurations.

Model offers detailed predictions for ${ar P}ANDA$ experimental conditions.

Abstract

We study the production of charmed baryons in the antiproton-proton and antiproton-nucleus interactions within a fully covariant model that is based on an effective Lagrangian approach. The baryon production proceeds via the $t$-channel $D^0$ and $D^{*0}$ meson-exchange diagrams. We have also explored the production of the charm-baryon hypernucleus $^{16}_{\Lambda_c^+}$O in the antiproton - $^{16}$O collisions. For antiproton beam momenta of interest to the ${\bar P}ANDA$ experiment, the 0$^\circ$ differential cross sections for the formation of $^{16}_{\Lambda_c^+}$O hypernuclear states with simple particle-hole configurations, have magnitudes in the range of a few $\mu$b/sr.