Two-Loop Chiral Perturbation Theory and the Pion-Pion Phase Shifts

J. Sa Borges, J. Soares Barbosa, M. D. Tonasse +1

We want to test the predictive power of Chiral Perturbation Theory (ChPT). In this work, we use the ChPT pion-pion scattering amplitude, including two loop contributions, and we ob…