RT Journal Article
T1 Unitarized pion-nucleon scattering within heavy baryon chiral perturbation theory
A1 Gómez Nicola, Ángel
A1 Peláez Sagredo, José Ramón
AB By means of the inverse amplitude method we unitarize the elastic pion-nucleon scattering amplitudes obtained from heavy baryon chiral perturbation theory to O(q(3)). Within this approach we can enlarge their applicability range and generate the Delta(1232) resonance. We can find a reasonable description of the pion nucleon phase shifts with O(q(2)) parameters in agreement with the resonance saturation hypothesis. However, the uncertainties in the analysis of the low energy data as well as the large number of chiral parameters, which can have strong correlations, allow us to obtain very good fits with rather different sets of chiral constants.
PB Amer Physical Soc
SN 1550-7998
YR 2000
FD 2000-07-01
LK https://hdl.handle.net/20.500.14352/59581
UL https://hdl.handle.net/20.500.14352/59581
LA eng
NO © 2000 The American Physical Society.This work was partially supported by DGICYT under contract AEN97-1693 and PB98-0782. J.R.P. thanks J.A. Oller and E. Oset for useful discussions.
NO DGICYT
DS Docta Complutense
RD 18 abr 2025