2002/05/19 by A. I. Titov, T.-S. H. Lee, T. S. -H. Lee
Mathematics · Physics and Astronomy · #Applied mathematics #Black Holes and Theoretical Physics #Computer science #Lagrangian #Mathematics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.66.015204
published as Phys.Rev. C66 (2002) 015204 · 25 pages, 10 figures
arxiv created 2002/05/19 · openalex publication_date 2002/07/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We apply the effective Lagrangian approach to investigate the role of the nucleon resonances in \ensuremathω-meson photoproduction at energies near the threshold. The nonresonant amplitudes are taken from the previous investigations at higher energies and consist of the pseudoscalar meson exchange and the nucleon Born terms. The resonant amplitudes are calculated from effective Lagrangians with the N*\ensuremath→\ensuremathγN and N*\ensuremath→\ensuremathωN coupling constants fixed by the empirical helicity amplitudes and the vector meson dominance model. The contributions from the nucleon resonances are found to be significant in changing the differential cross sections in a wide interval of t and various spin observables. In particular, we suggest that a crucial test of our predictions can be made by measuring single and double spin asymmetries.