Two-Loop Chiral Perturbation Theory and the Pion-Pion Phase Shifts
High Energy Physics - Phenomenology
2007-05-23 v1
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.
Keywords
Cite
@article{arxiv.hep-ph/9806500,
title = {Two-Loop Chiral Perturbation Theory and the Pion-Pion Phase Shifts},
author = {J. Sa Borges and J. Soares Barbosa and M. D. Tonasse and J. Haidenbauer},
journal= {arXiv preprint arXiv:hep-ph/9806500},
year = {2007}
}
Comments
6 pages in latex 6 ps figures