1998/08/06 by S. A. Coon, M. D. Scadron
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.58.2958
published as Phys.Rev.C58:2958-2962,1998 · 18 pages, 2 figures, to appear in Physical Review C
arxiv created 1998/08/06 · openalex publication_date 1998/11/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The scale of a phenomenologically successful charge-symmetry-violating nucleon-nucleon interaction, that attributed to meson exchange with a \ensuremathΔI=1 \ensuremathρ-\ensuremathω transition, is set by the Coleman-Glashow SU(2)-breaking tadpole mechanism. A single tadpole scale has been obtained from symmetry arguments, electromagnetic meson and baryon measured mass splittings, and the observed isospin-violating (\ensuremathΔI=1) decay \stackrel\ensuremath→\ensuremathω\ensuremathπ+\ensuremathπ^\ensuremath-. The hadronic realization of this tadpole mechanism lies in the I=1 a0 scalar meson. We show that measured hadronic and two-photon widths of the a0 meson, with the aid of the vector meson dominance model, recover the universal Coleman-Glashow tadpole scale.