IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Pion radiative weak decays in nonlocal chiral quark models
Autor/es:
D. GOMEZ DUMM; S. NOGUERA; N.N. SCOCCOLA
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 698 p. 236 - 242
ISSN:
0370-2693
Resumen:
We analyze the radiative pion decay pi+ -> e+ nue g within nonlocal chiral quark models that include wave function renormalization. In this framework we calculate the vector and axial-vector form factors FV and FA at q2=0 where q2 is the e+ nue squared invariant mass and the slope a of FV(q2) at q2 -> 0. The calculations are carried out considering different nonlocal form factors, in particular those taken from lattice QCD evaluations, showing a reasonable agreement with the corresponding experimental data. The comparison of our results with those obtained in the (local) NJL model and the relation of FV and a with the form factor in pi0 -> g g decays are discussed.
