Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-09-30
Nucl.Phys. B517 (1998) 36-52
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, 3 figures, uses harvmac and epsf
Scientific paper
10.1016/S0550-3213(97)00755-4
We construct two dimensional gauge theories with $N= (4,4)$ supersymmetry from branes of type IIA string theory. Quantum effects in the two dimensional gauge theory are analyzed by embedding the IIA brane construction into M-theory. We find that the Coulomb branch of one theory and the Higgs branch of a mirror theory become equivalent at strong coupling. A relationship to the decoupling limit of the type IIA and IIB 5-branes in Matrix theory is shown. T-duality between the ALE metric and the wormhole metric of Callan, Harvey, and Strominger is discussed from a brane perspective and some puzzles regarding string duality resolved. We comment on the existence of a quantum Higgs branch in two dimensional theories. Branes prove to be useful tools in analyzing singular conformal field theories.
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