Vector meson dominance and {rho}-{omega} mixing
- Physics Department, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
- Physics Department, University of Arizona, Tucson, Arizona 85721 (United States)
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}{r_arrow}{pi}{sup +}{pi}{sup {minus}}. The hadronic realization of this tadpole mechanism lies in the I=1 a{sub 0} scalar meson. We show that measured hadronic and two-photon widths of the a{sub 0} meson, with the aid of the vector meson dominance model, recover the universal Coleman-Glashow tadpole scale. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 663762
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 58; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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