Error estimates for pi-pi scattering threshold parameters in Chiral Perturbation Theory to two loops

preprint2000arXivOpen access

Abstract

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.

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