Finite Theories and Marginal Operators on the Brane

Details Finite Theories and Marginal Operators on the Brane Finite Theories and Marginal Operators on the Brane

1998-03-11

arxiv.org/abs/hep-th/9803086v1

JHEP 9806:011,1998

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 13 figures, uses revtex

Scientific paper

10.1088/1126-6708/1998/06/011

We show how to use D and NS fivebranes in Type IIB superstring theory to construct large classes of finite N=1 supersymmetric four dimensional field theories. In this construction, the beta functions of the theories are directly related to the bending of branes; in finite theories the branes are not bent, and vice versa. Many of these theories have multiple dimensionless couplings. A group of duality transformations acts on the space of dimensionless couplings; for a large subclass of models, this group always includes an overall $SL(2,\ZZ)$ invariance. In addition, we find even larger classes of theories which, although not finite, also have one or more marginal operators.

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