Two loops calculation in chiral perturbation theory and the unitarization program of current algebra
classification
✦ hep-ph
keywords
algebracalculationchiralcurrentperturbationscatteringtheoryamplitude
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In this paper we compare two loop Chiral Perturbation Theory (ChPT) calculation of pion-pion scattering with the unitarity second order correction to the current algebra soft-pion theorem. It is shown that both methods lead to the same analytic structure for the scattering amplitude.
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