Error estimates for ππ scattering threshold parameters in Chiral Perturbation Theory to two loops
Departamento de Física Moderna, Universidad de Granada, E-18071, Granada, Spain
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Published online: 11 September 2013
Using the analysis of ChPT to two loops, we perform an error analysis of the threshold and low-energy parameters, based on the uncertainties for the one-loop low-energy parameters and the resonance saturation mechanism. Different sets of one-loop low-energy constants have been considered. Thus, the predictive power of the effective field theory, is quantified on the basis of the present experimental uncertainties.
PACS: 11.30.Rd Chiral symmetries – / 11.80.Et Partial-wave analysis – / 12.38.Bx Perturbative calculations – / 13.75.Lb Meson-meson interactions –
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