Axial U(1) dynamics in eta and eta' photoproduction

Abstract

We discuss the sensitivity of eta and eta' photoproduction near threshold to the gluonic OZI breaking parameters in the U_A(1)-extended effective chiral Lagrangian for low-energy QCD. Our coupled-channels analysis hints at a strong correlation between the gluon-induced contributions to the eta' mass and the low-energy pp -> pp eta' reaction and the near-threshold behaviour of the gamma p -> eta p cross-section.

19 pages, 9 figures

References in corpus (5)

• Quark structure of pseudoscalar mesons
• Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction
• Chiral SU(3) Dynamics with Coupled Channels: Inclusion of P-Wave Multipoles
• Radiative ${\eta }^{\prime }$ Decays, the Topological Susceptibility and the Witten-Veneziano Mass Formula
• The eta' and the topological charge density

Cited by in corpus (7)

• Close-to-threshold Meson Production in Hadronic Interactions
• Eta bound states in nuclei: a probe of flavour-singlet dynamics
• Gauge invariance in two-particle scattering
• Eta, eta-prime photoproduction and electroproduction off nucleons
• Final state interaction and a light mass "exotic" resonance
• S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians
• Effect of the final state interaction of ${\eta }^{\prime }N$ on the ${\eta }^{\prime }$ photoproduction off nucleon