Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-10-26
Few Body Syst.50:183-186,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 2 figures, Contribution to the proceedings of the 21st European Conference on Few-Body Problems in Physics, Salamanca
Scientific paper
10.1007/s00601-010-0126-4
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.
Haidenbauer Johann
Krein Gastao
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