RT Journal Article T1 The inversed amplitude method and heavy baryon chiral perturbation theory applied to pion-nucleon scattering A1 Peláez Sagredo, José Ramón A1 Gómez Nicola, Ángel AB We report on our present work, where by means of the Inverse Amplitude Method we unitarize the elastic pion nucleon scattering amplitudes of Heavy Barion Chiral Perturbation Theory at O(q(3)). We reproduce the scattering up to the inelastic thresholds including the Delta(1232) resonance. The fitted chiral constants are rather different from those obtained by fitting the extrapolated threshold parameters for the non-unitarized theory. PB Elsevier Science Bv SN 0375-9474 YR 1999 FD 1999 LK https://hdl.handle.net/20.500.14352/59579 UL https://hdl.handle.net/20.500.14352/59579 LA eng NO © Elsevier Science Bv. DS Docta Complutense RD 10 abr 2025