Electromagnetic structure and weak decay of pseudoscalar mesons in a   light-front QCD-inspired model
  We study the scaling of the $^3S_1-^1S_0$ meson mass splitting and the pseudoscalar weak decay constants with the mass of the meson, as seen in the available experimental data. We use an effective light-front QCD-inspired dynamical model regulated at short-distances to describe the valence component of the pseudoscalar mesons. The experimentally known values of the mass splittings, decay constants (from global lattice-QCD averages) and the pion charge form factor up to 4 [GeV/c]$^2$ are reasonably described by the model 
L. A. M. Salcedo, (Present address at Instituto de Fisica,   Universidade Federal do Rio Grande do Sul, Campus do Vale, Port...