On Valence Gluons in Heavy Quarkonia

Abstract

To include the explicit valence gluon degrees of freedom into spectroscopy of the lowest states of heavy quarkonia, we consider, within an adiabatic model, the properties of the lowest hybrid $\bar{Q}Qg$-mesons and estimate the effects of their mixing with low-lying vector $\bar{c}c$-charmonia. The perspectives of compatibility of the resulting picture with data are discussed.

LaTex, 5 pages, no figures; Talk at the XIth International Conference on Problems of Quantum Field Theory, dedicated to 90th anniversary of Professor D.I. Blokhintsev, Joint Institute for Nuclear Research, Dubna, Russia, July 13-17, 1998