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We have measured precise total and differential cross sections for the reaction γp→pη from threshold to 790 MeV at the MAMI accelerator in Mainz with the neutral meson spectrometer TAPS. Resonance parameters of the S₁₁(1535) resonance and the electromagnetic coupling γp→S₁₁ have been extracted from the data. Contributions from the D₁₃(1520) resonance to η photoproduction in the threshold region have been identified for the first time via interference terms in the angular distributions.
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Krusche et al. (1995) studied this question.
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