Eta photoproduction off the neutron at GRAAL

Details Eta photoproduction off the neutron at GRAAL Eta photoproduction off the neutron at GRAAL

2005-12-31

arxiv.org/abs/hep-ex/0601002v1

Physics

High Energy Physics

High Energy Physics - Experiment

To appear in Proceedings of Workshop on the Physics of Excited Nucleons NSTAR2005, 12 - 15 October 2005, Tallahassee, Florida,

Scientific paper

The gamma n -> eta n quasi-free cross section reveals a resonant structure at
W ~ 1.675 GeV. This structure may be a manifestation of a baryon resonance. A
priori its properties, the possibly narrow width and the strong photocoupling
to the neutron, look surprising. This structure may also signal the existence
of a narrow state.

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