IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Form factors of radiative pion decays in nonlocal chiral quark models
Autor/es:
DANIEL GOMEZ DUMM; SANTIAGO NOGUERA; NORBERTO N. SCOCCOLA
Revista:
PHYSICAL REVIEW D
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 86 p. 740201 - 7402010
ISSN:
1550-7998
Resumen:
We study the radiative pion decay pi+ --> e+ nu_e gamma within nonlocal chiral quark models that include wave function renormalization. In this framework we analyze the momentum dependence of the vector form factor F_V(q2) and the slope of the axial-vector form factor F_A(q2) at threshold. Our results are compared with available experimental information and with the predictions given by the Nambu-Jona-Lasinio model. In addition we calculate the low energy constants l5 and l6, comparing our results with the values obtained in chiral perturbation theory.
