Medium Effects in Coherent Pion Photo- and Electroproduction on 4He and 12C

Abstract

Coherent pi0 photo- and electroproduction on 4He and 12C nuclei is investigated in the framework of a distorted wave impulse approximation in momentum space. The elementary process is described by the recently developed unitary isobar model. Medium effects are considered by introducing a phenomenological Delta self-energy. The recent experimental data for 4He and 12C can be well described over a wide range of energies and emission angles by the assumption that the Delta-nuclear interaction saturates.

18 pages LaTeX including 7 postscript figures

References in corpus (3)

• A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV
• Coherent Photoproduction of Pions on Spin-Zero Nuclei in a relativistic, non-local Model
• Coherent π^\circ photoproduction from ^4He

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