Pion photoproduction in a dynamical coupled-channels model
Abstract
The charged and neutral pion photoproduction reactions are investigated in a dynamical coupled-channels approach based on the formulation of Haberzettl, Huang, and Nakayama [Phys. Rev. C 83, 065502 (2011)]. The hadronic final-state interaction is provided by the Juelich pi-N model, which includes the channels pi-N and eta-N comprising stable hadrons as well as the effective pi-pi-N channels pi-Delta, sigma-N, and rho-N. This hadronic model has been quite successful in describing pi-N to pi-N scattering for center-of-mass energies up to 1.9 GeV. By construction, the full pion photoproduction current satisfies the generalized Ward-Takahashi identity and thus is gauge invariant as a matter of course. 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 pi0 p, gamma n to pi- p and gamma n to pi0 n are in good agreement with the experimental data.
Cite
@article{arxiv.1110.3833,
title = {Pion photoproduction in a dynamical coupled-channels model},
author = {F. Huang and M. Döring and H. Haberzettl and J. Haidenbauer and C. Hanhart and S. Krewald and U. -G. Meißner and K. Nakayama},
journal= {arXiv preprint arXiv:1110.3833},
year = {2016}
}
Comments
revtex4-1, 26 pages, 6 tables, 21 figures