Interference phenomena in the Jᵖ=1/2--wave in η photoproduction
Anisovich, A. V. · Klempt, E. · Krusche, B. · Nikonov, V. A. · Sarantsev, A. V. · Thoma, U. · Werthmüller, D.
الأصل · EN
The recent precise experimental results for the photoproduction of η-mesons off the neutron measured with the Crystal Ball/TAPS calorimeter at the MAMI accelerator have been investigated in detail in the framework of the Bonn-Gatchina coupled channel model. The main result is that the narrow structure observed in the excitation function of γn → nη can be reproduced fully with a particular interference pattern in the Jᵖ=1/2- partial wave. Introduction of the narrow resonance N(1685) with the properties reported in earlier publications deteriorates the quality of the fit.
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