Pion Electromagnetic Form Factor at Lower and Higher Momentum Transfer
  The pion electromagnetic form factor is calculated at lower and higher momentum transfer in order to explore constituent quark models and the differences among those models. In particular, the light-front constituent quark model is utilized here to calculate the pion electromagnetic form factor at lower and higher energies. The matrix elements of the electromagnetic current, are calculated with both "plus" and "minus" components of the electromagnetic current in the light-front. Further, the electromagnetic form factor is compared with other models in the literature and experimental data. 
J. P. B. C. de Melo, R\^omulo Moreira Moita and Kazuo Tsushima   (Laborat\'orio de F\'isica Te\'orica e Computacional, LFTC,...
hep-ph hep-ex nucl-th