  A model of mesons which is based on the QCD Hamiltonian in Coulomb gauge is
presented. The model relies on a novel quasiparticle basis to improve the
reliability of the Fock space expansion. It is also relativistic, yields chiral
pions, and is tightly constrained by QCD (quark masses are the only
parameters). Applications to hidden flavor mesons yield results which are
comparable to phenomenological constituent quark models while revealing the
limitations of such models.
