Pion--deuteron scattering length in Chiral Perturbation Theory up to order \chi^{3/2}

Abstract

A complete calculation of the corrections to pion-deuteron scattering length up to order ${\chi }^{3/2}$ with $\chi =m_{\pi }/M_N$ is performed. The calculation includes the dispersive contributions and corrections due to the explicit treatment of the $\Delta$ resonance. s-wave pion-nucleon scattering parameters are extracted from a combined analysis of modern experimental data.

Comments: 10 papes, 3 figures. Invited talk to the 11th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Sept. 10th-14th 2007 (MENU 2007), Juelich, Germany