The role of the $\Delta (1232)$-resonance in covariant baryon chiral perturbation theory

Abstract

We stress, on theoretical and phenomenological grounds, the importance of the $\Delta (1232)$-resonance in a chiral effective field theory approach applied to the study of $\pi N$ scattering. We show how its inclusion as a dynamical degree of freedom allow us to obtain reliably valuable information from $\pi N$ scattering data.

Comments: Contribution to NSTAR 2013, May 27-30, 2013, Peniscola (Spain); 4 pages