The scientific community has witnessed what is called the golden age for heavy quarko- nium physics, dawned a decade ago and initiated by the confluence of exciting theoretical advances in QCD and an explosion of related experimental activity. At low energies of QCD, where the hadron properties are involved, perturbative calculations cannot be applied and other methods should be developed to deal with. Among them, constituent quark models, which incorporate the main properties of QCD, describe quite well mesons and baryons as composite objects made of constituent valence quarks. An investigation of heavy meson properties within the framework of a constituent quark model is presented. We study possible assignments of the new particles as qq-bar states. Besides meson spectra, we calculate other properties that can provide valuable information on the meson structure as electromagnetic decays and strong and weak reactions. The description of theoretical approaches used and the discussion of some relevant results is pursued along the talk.
Back to the theory seminar page.