Proton-Antiproton Annihilation into a Lambda_c-Antilambda_c Pair
arXiv:0905.2561 · doi:10.1140/epja/i2009-10862-x
Abstract
The process p-pbar -> Lambda_c-Antilambda_c is investigated within the handbag approach. It is shown that the dominant dynamical mechanism, characterized by the partonic subprocess u-ubar -> c-cbar factorizes in the sense that only the subprocess contains highly virtual partons, a gluon to lowest order of perturbative QCD, while the hadronic matrix elements embody only soft scales and can be parameterized in terms of helicity flip and non-flip generalized parton distributions. Modelling these parton distributions by overlaps of light-cone wave functions for the involved baryons we are able to predict cross sections and spin correlation parameters for the process of interest.
39 pages, 7 figures, problems with printout of figures resolved, Ref. 33 and referring sentences in section 4 changed
References in corpus (7)
- Masses of excited heavy baryons in the relativistic quark-diquark picture
- Nucleon Form Factors in QCD
- Diquarks and Λ_{b}\toΛ_c weak decays
- Distribution Amplitudes of the Lambda_b Baryon in QCD
- Compton Scattering Cross Section on the Proton at High Momentum Transfer
- Nucleon distribution amplitudes from lattice QCD
- Test of the heavy quark-light diquark approximation for baryons with a heavy quark