Gasser-Sainio-Svarc 1988 + Jenkins-Manohar 1991 HBChPT: expansion around heavy-baryon limit avoids relativistic-baryon power-counting issues; pi-N scattering + nucleon EM form factors.
Gasser-Sainio-Svarc 1988 + Jenkins-Manohar 1991 HBChPT: expansion around heavy-baryon limit avoids relativistic-baryon power-counting issues; pi-N scattering + nucleon EM form factors.