RT Journal Article
T1 Improved unitarized heavy baryon chiral perturbation theory for π N scattering to fourth order
A1 Gómez Nicola, Ángel
A1 Nieves, J.
A1 Peláez Sagredo, José Ramón
A1 Ruiz Arriola, E.
AB We extend our previous analysis of the unitarized pion-nucleon scattering amplitude including up to fourth order terms in heavy baryon chiral perturbation theory. We pay special attention to the stability of the generated Delta(1232) resonance, the convergence problems, and the power counting of the chiral parameters.
PB American Physical Society
SN 0556-2821
YR 2004
FD 2004-03-01
LK https://hdl.handle.net/20.500.14352/51400
UL https://hdl.handle.net/20.500.14352/51400
LA spa
NO © 2004 The American Physical Society.This work was supported in part by funds provided by the Spanish DGI with Grant Nos.  FM2002-03218, BFM2000- 1326 and BFM2002-01003; CICYT Grant No. FPA2000- 0956; Junta de Andalucía Grant No. FQM-225 and EURIDICE with contract number HPRN-CT-2002-00311.
NO Spanish DGI
NO CICYT
NO Junta de Andalucía
NO EURIDICE
DS Docta Complutense
RD 9 abr 2025