QCD SPECTRAL SUM RULES FOR HEAVY FLAVOURS

Abstract

Recent developments in the uses of QCD spectral sum rules (QSSR) for heavy flavours are summarized and updated. QSSR results are compared with the existing data and with the ones from alternative approaches.

Comments: 22 pages on Latex files. Talk given at the Cracow Epiphany Conference on Heavy Quarks in honour of the 60th birthday of Kacper Zalewski (to appear in Acta physica Polonica). This is an updated version of the CERN-TH.7277/94 (talk given by the Author at the Rencontre de Moriond, Meribel(1994) and of the CERN-TH.7444/94 (talk given by the Author at the QCD94 Conference, Montpellier (1994)) An extended version of this review will by published in: Recent Developments of QCD spectral sum rules by World Scientific Company.