Showing papers by "Heinrich Leutwyler published in 2005"
TL;DR: In this article, a brief review of the theoretical description of low energy pion-pion scattering by the combined use of Chiral Perturbation theory and Roy equations is given.
Abstract: We give a brief review of the theoretical description of low energy pion-pion scattering by the combined use of Chiral Perturbation Theory and Roy equations, an update of the Regge parametrization of $\pi\pi$ cross sections at high energies, and a short discussion of the scalar radius of the pion.
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