$O(p^6)$ extension of the large--$N_C$ partial wave dispersion relations

Z. H. Guo, J. J. Sanz-Cillero, H. Q. Zheng

Continuing our previous work(JHEP 0706:030,2007), large--$N_C$ techniques and partial wave dispersion relations are used to discuss $\pi \pi$ scattering amplitudes. We get a set of pred…