Low energy pion-${\mathrm{\Lambda }}_b$ interaction

In this work we study the low energy pion-${\mathrm{\Lambda }}_b$ interaction considering effecective chiral Lagrangians that include pions, baryons and the corresponding resonances. Interactions mediated by a $\sigma$ meson exchange are also considered. The scattering amplitudes are calculated and then we determine the angular distributions and polarizations.