Modeling electromagnetic form factors of light and heavy pseudoscalar   mesons
  The electromagnetic form factors of light and heavy pseudoscalar mesons are calculated within two covariant constituent-quark models, a light-front and a dispersion relation approach. We investigate the details and physical origins of the model dependence of various hadronic observables: the weak decay constant, the charge radius and the elastic electromagnetic form factor. 
B. El-Bennich (LPNHE, France and ANL, USA), J. P. B. C. de Melo (LFTC,   Universidade Cruzeiro do Sul and IFT, UNESP, Brazil...