2008/02/29 by Mark Paris, Mark W. Paris
Physics and Astronomy · #Center (category theory) #Crystallography #Excited state #Hadron #Meson #Nuclear physics #Nuclear physics research studies #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Production (economics) #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scattering #nucl-th
paper · pdf · doi:10.1103/physrevc.79.025208
published as Phys.Rev.C79:025208,2009 · 26 pages, 18 figures, submitted to Phys. Rev. C; corrected typos, added references, minor revisions, same results/figs
arxiv created 2008/03/05 · openalex publication_date 2009/02/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The dynamical coupled-channels approach developed at the Excited Baryon Analysis Center is extended to include the \ensuremathωN channel to study \ensuremathπ- and \ensuremathω-meson production induced by scattering pions and photons from the proton. Six intermediate channels, including \ensuremathπN, \ensuremathηN, \ensuremathπ\ensuremathΔ, \ensuremathσN, \ensuremathρN, and \ensuremathωN, are employed to describe unpolarized and polarized data. Bare parameters in an effective hadronic Lagrangian are determined in a fit to the data for \ensuremathπN\ensuremath→\ensuremathπN, \ensuremathγN\ensuremath→\ensuremathπN, \ensuremathπ^\ensuremath-p\ensuremath→\ensuremathωn, and \ensuremathγp\ensuremath→\ensuremathωp reactions at center-of-mass energies from threshold to W<2.0 GeV. The T matrix determined in these fits is used to calculate the photon beam asymmetry for \ensuremathω-meson production and the \ensuremathωN\ensuremath→\ensuremathωN total cross section and \ensuremathωN-scattering lengths. The calculated beam asymmetry is in good agreement with the observed in the range of energies near threshold to W\ensuremath\lesssim2.0 GeV.