Charmonium and exotics from lattice QCD

Abstract

We review selected lattice results on the charmonium spectrum and first attempts to search for the existence of exotic states. The hadro-quarkonium model was proposed to interpret some of the exotic states as a quarkonium core inside a hadron. We present a lattice study of the hadro-quarkonium model in the limit of static quarks. The charm quark decouples in low energy observables and binding energies of charmonium. In a model calculation we are able to evaluate the corrections to decoupling of the charm quark in the continuum.

Comments: 8 pages, 6 figures, proceedings of The 9th International Workshop on Charm Physics (CHARM 2018), Novosibirsk, Russia, 21-25 May, 2018