Production of single-charmed baryons in a quark model approach

Abstract

The production of single-charmed baryons ${\Lambda }_c^{+}{\Lambda }_c^{-}$, ${\Lambda }_c^{+}{\Sigma }_c^{-}$+h.c. and ${\Sigma }_c^{+}{\Sigma }_c^{-}$ in $p\bar{p}$ collisions is studied in the framework of a constituent quark model which has satisfactorily described the $N\bar{N}$ system and the strangeness production $p\bar{p}\to \Lambda \bar{\Lambda }$, $\Lambda \bar{\Sigma }$ and $\Sigma \bar{\Sigma }$ processes. Predictions on the total cross sections are analyzed for different approaches to the underlying $n\bar{n}\to c\bar{c}$ process, mediated by one gluon annihilation diagrams. The results indicate that the cross section is of the order of $1$ nb between $10-14$ GeV for ${\Lambda }_c^{+}{\Lambda }_c^{-}$ and ${\Lambda }_c^{+}{\Sigma }_c^{-}$ channels, and around $0.01-0.1$ nb for ${\Sigma }_c^{+}{\Sigma }_c^{-}$. This estimations can be relevant for their future search in facilities like $\bar{P}$ANDA.

Comments: 7 pages, 6 figures