Low Energy Constants from High Energy Theorems

Details Low Energy Constants from High Energy Theorems Low Energy Constants from High Energy Theorems

1999-10-27

arxiv.org/abs/hep-ph/9910525v1

Phys.Rev. D61 (2000) 116005

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages TeX and mtexsis.tex

Scientific paper

10.1103/PhysRevD.61.116005

New constraints on resonance saturation in chiral perturbation theory are investigated. These constraints arise because each consistent saturation scheme must map to a representation of the full QCD chiral symmetry group. The low-energy constants of chiral perturbation theory are then related by a set of mixing angles. It is shown that vector meson dominance is a consequence of the fact that nature has chosen the lowest-dimensional nontrivial chiral representation. It is further shown that chiral symmetry places an upper bound on the mass of the lightest scalar in the hadron spectrum.

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