Signature of the ηNN configurations in coherent πphotoproduction on the deuteron
Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099, Mainz, Germany
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Accepted: 19 October 2005
Published online: 22 November 2005
The photoproduction of a neutral pion on the deuteron is considered in the energy region around the η threshold, where a bump-like structure was observed at very backward pion angles. Different dynamical aspects which may be responsible for this phenomenon are analysed within a theoretical frame which includes intermediate ηNN configurations. The results show, in particular, that a three-body treatment of the ηNN interaction is of special importance.
PACS: 13.60.Le Meson production – / 21.45.+v Few-body systems – / 25.20.-x Photonuclear reactions –
© Società Italiana di Fisica and Springer-Verlag, 2005