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Millenial Messages for QCD from the Superworld and from the String | | Matthew J. Strassler
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15 Sep 2003 | | Subject: | hep-th | | Affiliation: | U. Washington | | Abstract: | Supersymmetric gauge theories have had a significant impact on our understanding of QCD and of field theory in general. The phases of N=1 supersymmetric QCD (SQCD) are discussed, and the possibility of similar phases in non-supersymmetric QCD is emphasized. It is described how duality in SQCD links many previously known duality transformations that were thought to be distinct, including Olive-Montonen duality of N=4 supersymmetric gauge theory and quark-hadron duality in (S)QCD. A connection between Olive-Montonen duality and the confining strings of Yang-Mills theory is explained, in which a picture of confinement via non-abelian monopole condensation -- a generalized dual Meissner effect -- emerges explicitly. Similarities between supersymmetric and ordinary QCD are discussed, as is a non-supersymmetric QCD-like ``orbifold’’ of N=1 Yang-Mills theory. I briefly discuss the recent discovery that gauge theories and string theories are more deeply connected than ever previously realized. Specific questions for lattice gauge theorists to consider are raised in the context of the first two topics. (Published in ``At the Frontier of Particle Physics: Handbook of QCD’’, M. Shifman, editor) | | Source: | arXiv, hep-th/0309140 | | Services: | Forum | Review | PDF | Favorites | |
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