Generalized relativistic meson wave function

We study the most general, relativistic, constituent qq̄ meson wave function within a new covariant framework. We find that by including a tensor wave function component, a pure valence quark model is now capable of reproducing not only all static pion data (f_π,〈r_π²〉) but also the distribution amplitude, form factor [F_π(Q²)], and structure functions. Further, our generalized spin wave function provides a much better detailed description of meson properties than models using a simple relativistic extension of the $S=L=0$ nonrelativistic wave function.