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arXiv · 1109.4354

Dynamical coupled-channels model study of pion photoproduction

F. Huang·M. Döring·H. Haberzettl·J. Haidenbauer·C. Hanhart·S. Krewald·U. -G. Meißner·K. Nakayama
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Abstract

The photoproduction of pion off nucleon is investigated within a dynamical coupled-channels approach based on the Juelich pi-N model, which has been quite successful in the description of pi-N to pi-N scattering for center-of-mass energies up to 1.9 GeV. The full pion photoproduction amplitude is constructed to satisfy the generalized Ward-Takahashi identity and hence, it is fully gauge invariant. The calculated differential cross sections and photon spin asymmetries up to 1.65 GeV center-of-mass energy for the reactions gamma p to pi^+ n, gamma p to pi^0 p and gamma n to pi^- p are in good agreement with the experimental data.

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F. Huang, M. Döring, H. Haberzettl, J. Haidenbauer, C. Hanhart, S. Krewald, U. -G. Meißner, K. Nakayama. 2011-09-20. Dynamical coupled-channels model study of pion photoproduction. https://doi.org/10.1063/1.3701239

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