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arXiv 0707.2298hep-th
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在封闭字符串背景中的N=2即时子演算

N=2 Instanton Calculus In Closed String Background

Marco Billo, Marialuisa Frau, Alberto Lerda

摘要:

本文描述了如何通过计算D ~ 3/D(-1)膜系统中的弦散射振幅来获得四维规范理论中的瞬子效应。特别地,我们研究了在Z_2轨道和Ramond-Ramond闭弦背景下的分数阶D3/D(-1)膜系统,证明了它描述了N=2的超Yang-Mills理论的规范瞬子及其与N=2的引力光子的相互作用.使用弦论的方法,我们计算的前势的有效规范理论利用本地化方法的瞬子演算,这导致相同的信息给出的拓扑弦。

英文摘要:

In this contribution we describe how to obtain instanton effects in four dimensional gauge theories by computing string scattering amplitudes in D3/D(-1) brane systems. In particular we study a system of fractional D3/D(-1) branes in a Z_2 orbifold and in a Ramond-Ramond closed string background, and show that it describes the gauge instantons of N=2 super Yang-Mills theory and their interactions with the graviphoton of N=2. Using string theory methods we compute the prepotential of the effective gauge theory exploiting the localization methods of the instanton calculus, showing that this leads to the same information given by the topological string.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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