Anomalous Quark Chromomagnetic Moment Induced by Instantons

Abstract

It is shown that the quark-gluon interaction induced by instantons leads to the quark anomalous chromomagnetic moment. In the instanton-liquid model for the QCD vacuum, the chromomagnetic moment is ${\mu }_a=-\frac{\pi f}{2{\alpha }_s}$, where f is the packing fraction of instantons in the vacuum.

Comments: 5 pages, Latex, no figures. Talk presented at the XIII International Seminar on High Energy Physics Problems, 2-7 September, Dubna, Russia. One reference is corrected