Light front wave functions and diffractive electroproduction of vector mesons

We determine the leading Fock-state light front wave functions (LF-LFWFs) of $\rho$ and J/$\psi$ mesons, for first time from Dyson-Schwinger Bethe-Salpeter equations (DS-BSEs) approach. A unique advantage this method is that it renders a direct extraction LF-LFWFs in presence number higher Fock-states. Modulated by current quark mass driven dynamical chiral symmetry breaking (DCSB), we find $J/\psi$ different profile, i.e., former are broadly distributed $x$ (the longitudinal light-cone momentum fraction meson carried quark) while latter narrow. Moreover, contribute less than 50% to total normalization, suggesting considerable Fock-states $\rho$. then use these study diffractive electroproduction within dipole picture. The calculated cross section shows general agreement with HEAR data, except growing discrepancy production at low photon virtuality. Our work provides picture analysis on confronts parton nature (anti)quarks.