Exact propagators in harmonic superspace

Details Exact propagators in harmonic superspace Exact propagators in harmonic superspace

2004-07-28

arxiv.org/abs/hep-th/0407242v4

Phys.Lett. B600 (2004) 163-170

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 12 pages; V2: a reference added; V3: typos in eq. (3) corrected, the version to appear in PLB; V4: typos in eq. (47) co

Scientific paper

10.1016/j.physletb.2004.08.071

Within the background field formulation in harmonic superspace for quantum N = 2 super Yang-Mills theories, the propagators of the matter, gauge and ghost superfields possess a complicated dependence on the SU(2) harmonic variables via the background vector multiplet. This dependence is shown to simplify drastically in the case of an on-shell vector multiplet. For a covariantly constant background vector multiplet, we exactly compute all the propagators. In conjunction with the covariant multi-loop scheme developed in hep-th/0302205, these results provide an efficient (manifestly N = 2 supersymmetric) technical setup for computing multi-loop quantum corrections to effective actions in N = 2 supersymmetric gauge theories, including the N = 4 super Yang-Mills theory.

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