IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Pion photoproduction in a consistent isobar model
Autor/es:
A. MARIANO
Revista:
NUCLEAR PHYSICS A
Editorial:
Elsevier
Referencias:
Año: 2007 vol. 790 p. 267 - 271
ISSN:
0375-9474
Resumen:
The pion photoproduction amplitude is calculated within an isobar model already used to determine the Delta++(1232 MeV) parameters in pion-nucleon scattering. This amplitude is expressed in terms of physical on-shell quantities, and the contribution involving the off-shell behavior of the final state interaction is isolated as principal value integrals on the nonpolar pion-nucleon K-matrix. Different form factors to regularize these integrals are proved, we getting a model independent determination of the couplings GM and GE, which is consistent with the modern quark models for the resonance..
