Vector Meson Dominance and Rho-Omega Mixing

Details Vector Meson Dominance and Rho-Omega Mixing Vector Meson Dominance and Rho-Omega Mixing

1998-08-06

arxiv.org/abs/nucl-th/9808014v1

Phys.Rev.C58:2958-2962,1998

Physics

Nuclear Physics

Nuclear Theory

18 pages, 2 figures, to appear in Physical Review C

Scientific paper

10.1103/PhysRevC.58.2958

The scale of a phenomenologically successful charge-symmetry-violating nucleon-nucleon interaction, that attributed to meson exchange with a $\Delta I =1$ rho-omega 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 ($\Delta I=1$) decay $\omega \to \pi^+\pi^-$. The hadronic realization of this tadpole mechanism lies in the $I = 1$ $a_0$ scalar meson. We show that measured hadronic and two-photon widths of the $a_0$ meson, with the aid of the Vector Meson Dominance model, recover the universal Coleman-Glashow tadpole scale.

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