RT Journal Article
T1 Improved unitarized Heavy Baryon Chiral Perturbation Theory for π N scattering
A1 Gómez Nicola, Ángel
A1 Nieves, J.
A1 Peláez Sagredo, José Ramón
A1 Ruiz Arriola, E.
AB 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 expansion over the nucleon mass. Within this framework, the ∆ resonance and its associated pole can be recovered from the chiral parameters obtained from low-energy determinations. In addition, we can obtain a good description of the six S and P wave phase shifts in terms of chiral parameters with a natural size and compatible with the Resonance Saturation Hypothesis.
PB Elsevier science
SN 0370-2693
YR 2000
FD 2000-07-27
LK https://hdl.handle.net/20.500.14352/59585
UL https://hdl.handle.net/20.500.14352/59585
LA eng
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NO © 2000 Elsevier Science B.V. All rights reserved.This research was supported by DGES under contract PB98-1367 and by the Junta de Andalucía. Work partially supported by DGICYT under contracts AEN97-1693 and PB98-0782. We thank P. Buttiker, J.A.Oller and E.Oset for useful comments and discussions.
NO DGES
NO DGICYT
DS Docta Complutense
RD 6 may 2024