Chiral symmetry constraints on resonant amplitudes

  title={Chiral symmetry constraints on resonant amplitudes},
  author={Peter C. Bruns and M. Mai},
  journal={Physics Letters B},
Abstract We discuss the impact of chiral symmetry constraints on the quark-mass dependence of meson resonance pole positions, which are encoded in non-perturbative parametrizations of meson scattering amplitudes. Model-independent conditions on such parametrizations are derived, which are shown to guarantee the correct functional form of the leading quark-mass corrections to the resonance pole positions. Some model amplitudes for ππ scattering, widely used for the determination of ρ and… Expand

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