Model for JÕc absorption in hadronic matter

The cross sections for J/c absorption by p and r mesons are studied in a meson-exchange model that includes not only pseudoscalar-pseudoscalar-vector-meson couplings but also three-vector-meson and fourpoint couplings. We find that they are much larger than in a previous study where only pseudoscalarpseudoscalar-vector-meson couplings were considered. Including form factors at interaction vertices, the J/c absorption cross sections spc and src are found to have values on the order of 7 mb and 3 mb, respectively. Their thermal averages in hadronic matter at temperature T5150 MeV are, respectively, about 1 mb and 2 mb.