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

1998/06/26 by J. Sa Borges, J. Soares Barbosa, M. D. Tonasse +1
Physics and Astronomy · #hep-ph

paper · pdf

published as Hadronic J. 22 (1999) 617-623 · 6 pages in latex 6 ps figures

arxiv created 1998/06/26 · arxiv updated 2009/11/30

Abstract

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 obtain S- and P-wave low-energy phase shifts. We show that, by varying just one free parameter, the resulting S- and P-wave phase shifts are in reasonable agreement with the experimental data.

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