Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-11-27
Phys.Rev.D62:045001,2000
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, latex, comments/reference added
Scientific paper
10.1103/PhysRevD.62.045001
We study some aspects of low-energy effective actions in 4-d superconformal gauge theories on the Coulomb branch. We describe superconformal invariants constructed in terms of N=2 abelian vector multiplet which play the role of building blocks for the N=2,4 supersymmetric low-energy effective actions. We compute the one-loop effective actions in constant N=2 field strength background in N=4 SYM theory and in N=2 SU(2) SYM theory with four hypermultiplets in fundamental representation. Using the classification of superconformal invariants we then find the manifestly N=2 superconformal form of these effective actions. While our explicit computations are done in the one-loop approximation, our conclusions about the structure of the effective actions in N=2 superconformal theories are general. We comment on some applications to supergravity - gauge theory duality in the description of D-brane interactions.
Buchbinder Ioseph L.
Kuzenko Sergei M.
Tseytlin Arkady A.
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