2003/07/10 by M. Hedayati-Poor, S. Bayegan, H. S. Sherif +1 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.68.045205
published as Phys.Rev. C68 (2003) 045205 · 19 pages, 7 figures
arxiv created 2003/07/10 · openalex publication_date 2003/10/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A relativistic model for the quasifree exclusive photoproduction of \ensuremathη mesons on nuclei is extended to include both nonlocal and medium effects. The reaction is assumed to proceed via the dominant contribution of the S11(1535) 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 S11 resonance are studied. The effects of allowing S11 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.