Λ̄ c within the generalized parton picture - first results

We study proton-antiproton annihilation into ΛcΛ̄c pairs within the generalized parton picture. Our starting point is the double handbag diagram which is shown to factorize into soft generalized parton distributions for the p → Λc (and p̄ → Λ̄c) transition and a hard subprocess amplitude for uū→ cc̄. Thereby the mass of the charm quark is taken as the hard scale so that our results are not restricted to large scattering angles and/or incredibly large energies. Modelling the generalized parton distributions for the p → Λc transition by an overlap of simple quark-diquark light-cone wave functions we make first predictions for p→Λc transition form factors and unpolarized pp̄→ ΛcΛ̄c cross sections. Our findings may become interesting in view of forthcoming experiments at FAIR in Darmstadt.