Charm production in antiproton-proton annihilation

Abstract

We study the production of charmed mesons (D) and baryons (Lambda_c) in antiproton-proton (app) annihilation close to their respective production thresholds. The elementary charm production process is described by either baryon/meson exchange or by quark/gluon dynamics. Effects of the interactions in the initial and final states are taken into account rigorously. The calculations are performed in close analogy to our earlier study on app -> antiLambda-Lambda and app -> antiK-K by connecting the processes via SU(4) flavor symmetry. Our predictions for the antiLambda_c-Lambda_c production cross section are in the order of 1 to 7 mb, i.e. a factor of around 10-70 smaller than the corresponding cross sections for antiLambda-Lambda However, they are 100 to 1000 times larger than predictions of other model calculations in the literature. On the other hand, the resulting cross sections for antiD-D production are found to be in the order of 10^{-2} -- 10^{-1} microbarn and they turned out to be comparable to those obtained in other studies.

5 pages, 2 figures, Contribution to the proceedings of the 21st European Conference on Few-Body Problems in Physics, Salamanca, Spain, 30 August - 3 September 2010

References in corpus (8)

• Physics Performance Report for PANDA: Strong Interaction Studies with Antiprotons
• Dbar-N interaction from meson-exchange and quark-gluon dynamics
• Combined Description of $\overline{\mathbf{N}}\mathbf{N}$ Scattering and Annihilation With A Hadronic Model
• Charmed meson rescattering in the reaction pbar d to D Dbar N
• The reaction ppbar -> Lambda_c-Lambda_cbar close to threshold
• Exclusive charm production in pbar p collisions at s^1/2 <15 GeV
• Proton-Antiproton Annihilation into a Lambda_c-Antilambda_c Pair
• Nucleon-Antinucleon Annihilation at the Open Charm Threshold

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• Reaction $\bar{p}p\to {\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ within an effective Lagrangian model
• Double handbag description of proton-antiproton annihilation into a heavy meson pair
• Role of $Y(4630)$ in the $p\bar{p}\to {\Lambda }_c{\bar{\Lambda }}_c$ reaction near threshold
• $\bar{p}p$ annihilation into $\bar{D}D$ meson pair within an effective Lagrangian model
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• Production of heavy meson pairs in $p\bar{p}$ collisions within a double handbag approach