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Pion photoproduction in a dynamical coupled-channels model

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arxiv 1110.3833 v1 pith:JEBIBCWB submitted 2011-10-17 nucl-th hep-ph

F. Huang , M. Döring , H. Haberzettl , J. Haidenbauer , C. Hanhart , S. Krewald , U.-G. Mei{ss}ner , K. Nakayama This is my paper · ORCID
classification nucl-thhep-ph
keywords gammapi-nmodelphotoproductionpioncenter-of-masschannelscoupled-channels
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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.

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Cited by 2 Pith papers

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  1. Roles of $\Delta(1232)$, $N^*(1520)$, and $N^*(1650)$ resonances in $\gamma p\to \pi^0 \pi^0 p$ reaction within an effective Lagrangian approach

    hep-ph 2025-01 conditional novelty 6.0 of 10

    A tree-level effective Lagrangian model with Delta(1232), N*(1520), and N*(1650) reproduces the LEPS2/BGOegg gamma p to pi0 pi0 p data, assigning Delta(1232) to s-channel nucleon-pole production and the two N* resonan...

  2. Exclusive $\eta$ production in proton-proton collisions at energies available at the GSI Facility for Antiproton and Ion Research

    hep-ph 2025-01 conditional novelty 5.0 of 10

    A phenomenological model with N(1535) dominance and rho-exchange excitation reproduces existing pp to pp eta data and predicts cross sections for HADES, PANDA, and SIS100.

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