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arXiv · 0710.2218

Instantons in Deformed Super Yang-Mills Theories

Shin Sasaki·Katsushi Ito·Hiroaki Nakajima
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Abstract

We study the instanton effective action in deformed four-dimensional N=2 and N=4 super Yang-Mills (SYM) theories. These deformed gauge theories are defined on the D-brane world-volume in the presence of constant, self-dual Ramond-Ramond (R-R) 3-form field strength background $\mathcal{F}$ which is scaled as $(2 πα')^{1/2} \mathcal{F} = fixed$ in the zero-slope limit $α' \to 0$. The instanton effective action is obtained by solving equations of motion of the deformed N=2 SYM action. We show that this effective action correctly reproduces the string theory result derived from D3/D(-1)-branes system in the lowest order of the backgrounds and gauge coupling constant.

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Shin Sasaki, Katsushi Ito, Hiroaki Nakajima. 2007-10-21. Instantons in Deformed Super Yang-Mills Theories. https://arxiv.org/abs/0710.2218

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