  We study the light-unflavored mesons as relativistic bound states in the
nonperturbative Hamiltonian formalism of the basis light-front quantization
(BLFQ) approach. The dynamics for the valence quarks of these mesons is
specified by an effective Hamiltonian containing the one-gluon exchange
interaction and the confining potentials both introduced in our previous work
on heavy quarkonia, supplemented additionally by a pseudoscalar contact
interaction. We diagonalize this Hamiltonian in our basis function
representation to obtain the mass spectrum and the light-front wave functions
(LFWFs). Based on these LFWFs, we then study the structure of these mesons by
computing the electromagnetic form factors, the decay constants, the parton
distribution amplitudes (PDAs), and the parton distribution functions (PDFs).
Our results are comparable to those from experiments and other theoretical
models.
