The gVσγ coupling constants in hadron electrodynamics

2003/01/28 by M.P. Rekalo, Michail P. Rekalo, E. Tomasi‐Gustafsson +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1016/s0375-9474(03)01605-1

published as Nucl.Phys. A725 (2003) 116-126 · four figures, twelve pages

arxiv created 2003/01/28 · openalex publication_date 2003/07/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Recent measurements of the branching ratios for the decays ω→π⁰π⁰γ and ρ⁰→π⁰π⁰γ lead to coupling constants of the Vσγ-interaction (V is a vector meson) one order of magnitude smaller than previously assumed to describe the threshold cross section of γ+p→ p+ρ⁰ and the HERMES effect. The new g²_Vσγ couplings are in contradiction with the predictions of the QCD sum rules, but are in good agreement with VDM-estimation of the σ→ γγ-width.

Citations

• gρσγcoupling constant in light cone QCD
• Review of particle properties
• Review of Particle Physics