Duality and BPS spectra in N = 2 supersymmetric QCD
Abstract
I review, with some pedagogy, two different approaches to the computation of BPS spectra in N = 2 supersymmetric QCD with gauge group SU(2). The first one is semiclassical and has been widely used in the literature. The second one makes use of constraints coming from the non perturbative, global structure of the Coulomb branch of these theories. The second method allows for a description of discontinuities in the BPS spectra at strong coupling, and should lead to accurate test of duality conjectures in N = 2 theories.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 May 1997
 DOI:
 10.1016/S09205632(97)000856
 arXiv:
 arXiv:hepth/9611012
 Bibcode:
 1997NuPhS..55..245F
 Keywords:

 High Energy Physics  Theory
 EPrint:
 8 pages, to appear in the proceedings of the ICTP '96 spring workshop on string theory, gauge theory and quantum gravity (Nucl. Phys. B proc. sup.)