Instanton Calculus in R-R 3-form Background and Deformed N=2 Super Yang-Mills Theory

Abstract

We study the ADHM construction of instantons in N=2 supersymmetric Yang-Mills theory deformed in constant Ramond-Ramond (R-R) 3-form field strength background in type IIB superstrings. We compare the deformed instanton effective action with the effective action of fractional D3/D(-1) branes at the orbifold singularity of C^2/Z_2 in the same R-R background. We find discrepancy between them at the second order in deformation parameters, which comes from the coupling of the translational zero modes of the D(-1)-branes to the R-R background. We improve the deformed action by adding a term with space-time dependent gauge coupling. Although the space-time action differs from the action in the omega-background, both actions lead to the same instanton equations of motion at the lowest order in gauge coupling.

arXiv comment27 pages, version to appear in JHEP

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Cited by in corpus (6)

• Non-perturbative gauge/gravity correspondence in N=2 theories
• N=2 Instanton Effective Action in Omega-background and D3/D(-1)-brane System in R-R Background
• Non-perturbative studies of N=2 conformal quiver gauge theories
• BPS Monopole Equation in Omega-background
• Instanton Calculus in Deformed N=4 Super Yang-Mills Theories
• Fermionic T-duality and Morita Equivalence