Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-04-27
JHEP 0509 (2005) 073
Physics
High Energy Physics
High Energy Physics - Theory
35 pages, JHEP style
Scientific paper
10.1088/1126-6708/2005/09/073
We develop a systematic approach to construct the one-loop ${\cal N}=4$ SYM effective action depending on both ${\cal N}=2$ vector multiplet and hypermultiplet background fields. Beginning with the formulation of ${\cal N}=4$ SYM theory in terms of ${\cal N}=2$ harmonic superfields, we construct the one-loop effective action using the covariant ${\cal N}=2$ harmonic supergraphs and calculate it in ${\cal N}=2$ harmonic superfield form for constant Abelian strength $F_{mn}$ and corresponding constant hypermultiplet fields. The hypermultiplet-dependent effective action is derived and given by integral over the analytic subspace of harmonic superspace. We show that each term in the Schwinger-De Witt expansion of the low-energy effective action is written as integral over full ${\cal N}=2$ superspace.
Buchbinder Ioseph L.
Pletnev N. G.
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