Elastic ππ scattering to two loops
classification
✦ hep-ph
nucl-th
keywords
scatteringdeltaelasticloopsamplitudeanalyticallychiraldifference
read the original abstract
We evaluate analytically the elastic $\pi\pi$ scattering amplitude to two loops in chiral perturbation theory and give numerical values for the two $S$--wave scattering lengths and for the phase shift difference $\delta_0^0-\delta_1^1$.
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