The structure of the exact effective action and the quark confinement in MSSM QCD

Abstract

An expression for the exact (nonperturbative) effective action of $N$=1 supersymmetric gauge theories is proposed, supposing, that all particles except for the gauge bosons are massive. Analysis of its form shows, that instanton effects in the supersymmetric theories can lead to the quark confinement. The typical scale of confinement in MSSM QCD, calculated from the first principles, is in agreement with the experimental data. The proposed explanation is quite different from the dual Higgs mechanism.

Comments: Final version to appear in Sov.J.Nucl.Phys. Some insignificant errors and misprints are corrected