A Short Introduction to Non-Relativistic Effective Field Theories

Abstract

I discuss effective field theories for heavy bound systems, particularly bound systems involving two heavy quarks. The emphasis is on the relevant concepts and on interesting physical applications and results.

Comments: 21 pages, latex, 8 figures; Invited talk given at the XXIII International Workshop on the Fundamental Problems of High Energy Physics, Protvino (Russia), June 2000. Few misprints corrected