Heavy quarkonium decays and transitions in the language of effective field theories

Abstract

Heavy quarkonium decays and transitions are discussed in the framework of non-relativistic effective field theories. Emphasis is put on the matching procedure in the non-perturbative regime. Some exact results valid for the magnetic dipole couplings are discussed.

Comments: 7 pages; Talk given at Hadron 05, Rio de Janeiro, August 22-26, 2005 and QCD@Work 2005, Conversano, June 16-20, 2005