Quarkonia: a theoretical frame

Antonio Vairo

Published 2009-12-22Version 1

We discuss a general theoretical framework for the study of bound states made of two heavy quarks. For states below threshold, the framework has been developed to the level of providing precision studies for several charmonium and bottomonium observables. For states above threshold, like some of the newly discovered charmonium-like resonances at the B factories, a systematic description exists so far only for specific systems.