Charmonium in production in ppbar annihilation: Estimating cross sections from decay widths
2005 (English)In: arXiv: Electronical access to physics preprints, Vol. hep-ph, no 0507166Article in journal (Other scientific) Published
The cross sections for the charmonium production processes p+pbar->m+psi, where m is a light meson and psi is a charmonium state, are of great interest for the planned p+pbar experiment PANDA. In this paper we estimate these cross sections using known results for the decays psi->m+p+pbar, which are related to these reactions by crossing. In lieu of detailed experimental data on the decay Dalitz plots, we assume a constant amplitude as a first approximation; this implies a simple relation between the cross sections and decay widths. The single measured exclusive cross section of this type is p+pbar->pi0+Jpsi, which was reported by E760 to be 130+-25 pb near sqrt(s)=3.5-3.6 GeV. In comparison, our constant amplitude estimate is about 300 pb at this energy. This suggests that our approach is useful as a simple estimate, but should be refined through detailed modeling of resonances and other energy-dependent effects in the experimental psi->m+p+pbar Dalitz plots.
Place, publisher, year, edition, pages
2005. Vol. hep-ph, no 0507166
Charmonium, PANDA, decay, production, width, cross section, antiproton, proton, annihilation
IdentifiersURN: urn:nbn:se:uu:diva-77198OAI: oai:DiVA.org:uu-77198DiVA: diva2:105110
Submitted to Phys. Rev. D.
This research was supported in part by the Centre for Dynamical Processes and Structure Formation at the Faculty of Science and Technology and the Physics Graduate School gradU at Uppsala University, the Swedish Science Council VR, the U.S. National Science Foundation through grant NSF-PHY-0244786 at the University of Tennessee, and the U.S. Department of Energy under contract DE-AC05-00OR22725 at Oak Ridge National Laboratory.2006-03-132006-03-132011-01-11