Pion Form Factor in the Light-Front
  The pion electromagnetic form factor is calculated with a light-front quark model. The "plus" and "minus" component of the electromagnetic current are used to calculate the electromagnetic form factor in the Breit frame with two models for the q\bar{q} vertex. The light front constituent quark models describes very well hadronic wave function for pseudo-scalar and vector particles. Symmetry problems arinsing in the light-front approach are solved by the pole dislocation method. The results are compared with new experimental data and with other quark models. 
J.P.B.C.de Melo, (Instituto de Fisica Teorica, IFT, UNESP, SP., Brazil   and LPNHE, Universite P.& M.Curie, 4 Place Jussieu,...