Effective Chiral Lagrangian from Dual Resonance Models

Details Effective Chiral Lagrangian from Dual Resonance Models Effective Chiral Lagrangian from Dual Resonance Models

1995-09-08

arxiv.org/abs/hep-ph/9509259v2

Phys.Rev. D54 (1996) 1112-1124

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, the references list is updated, comparison with chiral quark model is done in more details

Scientific paper

10.1103/PhysRevD.54.1112

Parameters of the effective chiral lagrangian (EChL) of orders $O(p^4)$ and $O(p^6)$ are extracted from low--energy behaviour of dual resonance models for $ \pi\pi$ and $\pi K$ scattering amplitudes. Dual resonance models are considered to be good candidates for the resonance spectrum and for hadronic scattering amplitudes in the large $N_c$ limit of QCD. We discuss dual resonance models in the presence of spontaneous and explicit chiral symmetry breaking. Obtained parameters of the EChL are used to estimate chiral corrections up to the sixth order to various low--energy characteristics of $\pi\pi$ and $\pi K$ scattering amplitudes.

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