Abstract
The cross sections for absorption by and mesons are studied in a meson-exchange model that includes not only pseudoscalar-pseudoscalar-vector-meson couplings but also three-vector-meson and four-point couplings. We find that they are much larger than in a previous study where only pseudoscalar-pseudoscalar-vector-meson couplings were considered. Including form factors at interaction vertices, the absorption cross sections and are found to have values on the order of 7 mb and 3 mb, respectively. Their thermal averages in hadronic matter at temperature MeV are, respectively, about 1 mb and 2 mb.
- Received 21 December 1999
DOI:https://doi.org/10.1103/PhysRevC.62.034903
©2000 American Physical Society