## Abstract

We study some aspects of low-energy effective actions in 4d superconformal gauge theories on the Coulomb branch. We describe superconformal invariants constructed in terms of the script N sign=2 Abelian vector multiplet which play the role of building blocks for the script N sign=2, 4 low-energy effective actions. We compute the one-loop effective actions in a constant script N sign=2 field strength background in script N sign=4 SYM theory and in script N sign=2 SU(2) SYM theory with four hypermultiplets in the fundamental representation. Using a classification of superconformal invariants, we then find the manifestly script N sign=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 script N sign=2 superconformal theories are general. We comment on some relations to supergravity-gauge theory duality in the description of D-brane interactions.

Original language | English |
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Article number | 045001 |

Pages (from-to) | 1-9 |

Number of pages | 9 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 62 |

Issue number | 4 |

Publication status | Published - 15 Aug 2000 |

Externally published | Yes |