SAID analysis of meson photoproduction: Determination of neutron and proton EM couplings
1 Institute for Nuclear Studies, Department of Physics, The George Washington University, Washington, DC 20052, USA
2 Institute of Theoretical and Experimental Physics, Moscow 117259, Russia
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Published online: 9 June 2014
We present an overview of the GW SAID group effort to analyze on new pion photoproduction on both proton- and neutron-targets. The main database contribution came from the recent CLAS and MAMI unpolarized and polarized measurements. The differential cross section for the processes γn → π−p was extracted from new measurements accounting for Fermi motion effects in the impulse approximation (IA) as well as NN- and πN effects beyond the IA. The electromagnetic coupling results are compared to other recent studies.
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