Axial U(1) dynamics in η and η′ photoproduction

2000/07/26 by Steven D. Bass, S. Wetzel, Stefan Wetzel +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0375-9474(00)00574-1

published as Nucl.Phys. A686 (2001) 429-446 · 19 pages, 9 figures

arxiv created 2000/07/26 · openalex publication_date 2001/04/01 · arxiv updated 2009/11/30 · openalex created_date 2017/05/26 · openalex updated_date 2026/07/28

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.

Citations

• Mixing of η-η′ mesons in decays into a vector and a pseudoscalar meson
• Chiral perturbation theory: Expansions in the mass of the strange quark
• Axial-Vector Vertex in Spinor Electrodynamics
• φ-meson and unitary symmetry model
• Chiral Dynamics in Nucleons and Nuclei
• Review of Particle Physics