Abstract
A relativistic model for the quasifree exclusive photoproduction of mesons on nuclei is extended to include both nonlocal and medium effects. The reaction is assumed to proceed via the dominant contribution of the resonance. The complicated integrals resulting from the nonlocality are simplified using a modified version of a method given by Cooper and Maxwell. The nonlocality effects are found to affect the magnitude of the cross section. Some possible effects of the medium on the propagation and properties of the intermediate resonance are studied. The effects of allowing to interact with the medium via mean field scalar and vector potentials are considered. Both broadening of width and reduction in mass of the resonance lead to a suppression of the calculated cross sections.
- Received 30 May 2003
DOI:https://doi.org/10.1103/PhysRevC.68.045205
©2003 American Physical Society