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Chiral Perturbation Theory and Unitarization
E. Ruiz Arriola, A. Gómez Nicola, J. Nieves +1
We review our recent work on unitarization and chiral perturbation theory both in the and the sectors. We pay particular attention to the Bethe-Salpeter and Inverse Ampli…
Bethe-Salpeter Approach for the Elastic Pion-Nucleon Scattering in Heavy Baryon Chiral Perturbation Theory
J. Nieves, E. Ruiz Arriola
Heavy Baryon Chiral Perturbation Theory (HBChPT) to leading order provides a kernel to solve the Bethe-Salpeter equation for the (-channel) system, in the i…
Improved Unitarized Heavy Baryon Chiral Perturbation Theory for Scattering
A. Gómez Nicola, J. Nieves, J. R. Peláez +1
We show how the unitarized description of pion nucleon scattering within Heavy Baryon Chiral Perturbation Theory can be considerably improved, by a suitable reordering of the expan…
Unitarized Heavy Baryon Chiral Perturbation Theory and the Resonance in Scattering
J. Nieves, E. Ruiz Arriola
Based on the recent phenomenological analysis done by M. Mojzis, Eur. Phys. Jour. {\bf C2} (1998) 182, of scattering within the framework of Heavy Baryon Chiral Perturbation…