Instanton in the nonperturbative QCD vacuum
Abstract
Description
The influence of nonperturbative fields on instantons in quantum chromodynamics is studied. Effective action for instanton is derived in bilocal approximation and it is demonstrated that stochastic background gluon fields are responsible for IR stabilization of instantons. It is shown that instanton size in QCD is of order of 0.25 fm. Comparison of obtained instanton size distribution with lattice data is made.
6 pages, 2 figures. Talk given at 10th Lomonosov conference on Elementary Particle Physics, August 2001, Moscow, Russia
6 pages, 2 figures. Talk given at 10th Lomonosov conference on Elementary Particle Physics, August 2001, Moscow, Russia