Meson-baryon scattering to one-loop order in heavy baryon chiral perturbation theory

Bo-Lin Huang, Jin-Sheng Zhang, Yun-De Li, Norbert Kaiser

Published 2017-01-21Version 1

We calculate the T-matrices of pseudoscalar meson octet-baryon scattering to one-loop order in SU(3) heavy baryon chiral perturbation theory. The pertinent combinations of low-energy constants are determined by fitting to phase shifts of $\pi N$ and $K N$ scattering and the corresponding data. By using these low-energy constants, we predict scattering lengths and phase shifts for other channels and obtain reasonable results. The issue of convergence is discussed in detail.