Backward-angle photoproduction of eta meson from protons at E_gamma = 1.6 - 2.4 GeV

Details Backward-angle photoproduction of eta meson from protons at E_gamma = 1.6 - 2.4 GeV Backward-angle photoproduction of eta meson from protons at E_gamma = 1.6 - 2.4 GeV

2009-10-06

arxiv.org/abs/0910.0900v1

Phys.Rev.C80:052201,2009

Physics

Nuclear Physics

Nuclear Experiment

3 figures, Submitted to PRL

Scientific paper

10.1103/PhysRevC.80.052201

Differential cross sections for eta photoproduction off protons have been measured at E_gamma = 1.6 - 2.4 GeV in the backward direction. A bump structure has been observed above 2.0 GeV in the total energy. No such bump is observed in cross sections for eta', omega and pi0 photoproductions. It is inferred that this unique structure in eta photoproduction is due to a baryon resonance with a large portion of ss-bar strongly coupled to the etaN channel.

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