Related N = 2 SUSY YangMills theories and instanton expansion
Abstract
The low energy effective actions of the N = 2 SUSY SU (N_{c}) QCD are considered at the symmetric point on the moduli space. The classes of such theories have similar spectral curves. This fact allows us to show that all these models have the same structure of the coupling matrix and to show that the N_{f} = 2N_{c} spectral curve cannot be presented as a double covering of the sphere. We calculate first instanton contributions to the coupling matrix and get nonperturbative βfunctions in the SU (2) gauge theory with nonzero bare masses of the matter hypermultiplets.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(96)014542
 arXiv:
 arXiv:hepth/9607169
 Bibcode:
 1997PhLB..391..115G
 Keywords:

 High Energy Physics  Theory
 EPrint:
 Latex, 10 pages, 1 figure