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

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

1998-06-26

arxiv.org/abs/hep-ph/9806500v1

Hadronic J. 22 (1999) 617-623

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages in latex 6 ps figures

Scientific paper

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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