PT Journal
AU Gomez Dumm, D
   Noguera, S
   Scoccola, NN
TI Pion radiative weak decays in nonlocal chiral quark models
SO Physics Letters B
JI Phys. Lett. B
PY 2011
BP 236
EP 242
VL 698
IS 3
DI 10.1016/j.physletb.2011.03.002
LA English
DE Nonlocal quark models; Pion radiative weak decays
AB We analyze the radiative pion decay pi(+) -> e(+) nu(e)gamma within nonlocal chiral quark models that include wave function renormalization. In this framework we calculate the vector and axial-vector form factors F-V and F-A at q(2) = 0 – where q(2) is the e(+) nu(e) squared invariant mass – and the slope a of F-V (q(2)) at q(2) -> 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 F-V and a with the form factor in pi(0) -> gamma*gamma decays are discussed.
ER