Relativistic chiral representation of the $\pi N$ scattering amplitude II: The pion-nucleon sigma term

J. Martin Camalich, J. M. Alarcon, J. A. Oller

We present a determination of the pion-nucleon sigma-term based on a novel analysis of the $\pi N$ scattering amplitude in Lorentz covariant baryon chiral perturbation theory renormal…