Scaling Relation for Leptonic Constants\\ of Higher Excitations in Heavy Quarkonium

Abstract

Using a specific scheme of the QCD sum rules, one derives the relation for leptonic constants of $nS$-wave heavy qiarkonia, so $f_{n_1}^2/f_{n_2}^2=n_2/n_1$, that does not depend on the quarkonium content, and it is in a good agreement with the experimental values of constants for the $\psi$- and ${\rm Y}$-families.

Comments: Preprint IHEP 94-71, LATEX, 17 pages