Complete low-energy effective action in /N=4 SYM: a direct /N=2 supergraph calculation
Abstract
Using the covariant N=2 harmonic supergraph techniques we calculate the one-loop low-energy effective action of N=4 super-Yang-Mills theory in Coulomb branch with gauge group SU(2) spontaneously broken down to U(1). The full dependence of the low-energy effective action on both the hypermultiplet and gauge fields is determined. The direct quantum calculation confirms the correctness of the exact N=4 SYM low-energy effective action derived in arxiv:hep-th/0111062 on the purely algebraic ground by invoking a hidden N=2 supersymmetry which completes the manifest N=2 one to N=4 . Our results provide an exhaustive solution to the problem of finding out the exact completely N=4 supersymmetric low-energy effective action for the theory under consideration.
- Publication:
-
Nuclear Physics B
- Pub Date:
- March 2003
- DOI:
- 10.1016/S0550-3213(03)00036-1
- arXiv:
- arXiv:hep-th/0210241
- Bibcode:
- 2003NuPhB.653...64B
- Keywords:
-
- High Energy Physics - Theory
- E-Print:
- LaTeX, 21 pages