Bound states of heavy quarks in QCD

Abstract

Bound states of heavy $\bar{q}q$ quarks are reviewed within the context of QCD, paying attention to what can be derived from the theory with a reasonable degree of rigour. This is compared with the results of semiclassical arguments. Among new results, we report a very precise $O({\alpha }_s^4)$ evaluation of $b,c$ quark masses from quarkonium spectrum with a potential to two loops.

Plain TeX, 5 figures

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