Power counting in exclusive quarkonium decays

Abstract

Recent progress in the factorization of exclusive decays of heavy quarkonia into long-distance and short-distance contributions is presented. The role of higher Fock states and colour-octet contributions is outlined.

Comments: 6 pages, 3 figures, uses espcrc2.sty (included); to appear in the Proceedings of the High-Energy Physics Euroconference on Quantum Chromodynamics (QCD '97), Montpellier, France, 3-9 July 1997