Nuclear Pion Photoproduction

A-hole angular momentum Born amplitude Born approximation Born terms CGLN charged pion photoproduction charged pion production coherent component contribution coupling curve Devanathan diagrams differential cross sections dominant DWIA calculations E₁ elastic scattering electroproduction elementary amplitude experimental data experiments final state interaction form factor impulse approximation inelastic isobar isobar-doorway model isobar-hole isospin Klein-Gordon equation Lagrangian Lett low energy M₁ magnetic matrix element medium effects medium modifications mesons momentum space multipoles neutral pion production Nucl nuclear structure nuclear wave functions nucleon nucleus obtained outgoing pion parameters partial waves particle photon energy photopion photopion amplitude photopion production Phys Physics pion wave functions pion-nucleus elastic polarization production amplitude propagator reaction resonance region s-channel s-wave shell model Shoda single nucleon STMP Tabakin target theoretical theory tion transition amplitude transition operator Überall unitarity virtual photon wave functions