113 research outputs found

    Messages for QCD from the Superworld

    Get PDF
    Recent discoveries in supersymmetric gauge theories have significant implications for our understanding for 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 link between Olive-Montonen duality and the confining strings of (S)QCD is explained, in which a picture of confinement via non-abelian monopole condensation --- a generalized dual Meissner effect --- emerges explicitly. In this picture, unlike previous ones, the confining flux tubes carry the correct Z_N discrete charges. A number of studies of these subjects, which could be carried out using lattice gauge theory, are proposed.Comment: Talk given at YKIS '97, Kyoto, Japan. 24 pages, 3 figures, uses ptptex.sty,ptpprep.st

    Manifolds of Fixed Points and Duality in Supersymmetric Gauge Theories

    Get PDF
    There are many physically interesting superconformal gauge theories in four dimensions. In this talk I discuss a common phenomenon in these theories: the existence of continuous families of infrared fixed points. Well-known examples include finite N=4{\cal N}=4 and N=2{\cal N}=2 supersymmetric theories; many finite N=1{\cal N}=1 examples are known also. These theories are a subset of a much larger class, whose existence can easily be established and understood using the algebraic methods explained here. A relation between the N=1{\cal N}=1 duality of Seiberg and duality in finite N=2{\cal N}=2 theories is found using this approach, giving further evidence for the former. This talk is based on work with Robert Leigh (hep-th/9503121).Comment: Talk given at YKIS'95; 15 pp., uses ReVTeX, 3 uuencoded figure
    • …
    corecore