Reaction $\bar{p}p\to {\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ within an effective Lagrangian model

Abstract

We study the charmed baryon production reaction $\bar{p}p\to {\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ using the $t$-channel $D^0$ and $D^{\ast 0}$ meson exchange diagrams within an effective Lagrangian model involving the physical hadron masses and the coupling constants determined from SU(4) flavor symmetry. The initial and final state distortion effects are accounted for by using a simple eikonal approximation based procedure. The vertex parameters of our model have been checked by employing them to calculate the cross sections for the $\bar{p}p\to \bar{\Lambda }\Lambda$ reaction within a similar model. We predict the ${\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ production cross sections in the range of 1-30 $\mu b$ for antiproton beam momenta varying between threshold to 20 GeV/c. The respective roles of $D^0$ and $D^{\ast 0}$ meson exchanges and also those of the vector and tensor components of the $D^{\ast 0}$ coupling have been investigated

17 pages, 6 figures, Title slightly modified, Journal print version

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Cited by in corpus (6)

• Production of charmed baryons in $\bar{p}p$ collisions close to their thresholds
• $\bar{D}D$ meson pair production in antiproton-nucleus collisions
• Distillation of scalar exchange by coherent hypernucleus production in antiproton-nucleus collisions
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• Studying ${\Lambda }^{\ast }$ resonances in the $p\bar{p}\to \Lambda \bar{\Lambda }\eta$ reaction
• Estimation of coupling constants for D-meson, charmed, and light baryons in effective Lagrangian approach and quark model