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arXiv 1111.0842hep-th
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SU(N)N=2非共形规范理论中的弦瞬子

Stringy Instantons in SU(N) N=2 Non-Conformal Gauge Theories

Hossein Ghorbani, Daniele Musso

摘要:

在本文中,我们明确地获得了在平坦时空和存在非平凡引力光子背景场的情况下,由于弦瞬子引起的SU(N)N=2前势的主要修正。我们表明,弦修正的预位是表示在初等对称多项式。当N>2时,理论不是共形的;我们讨论了通过弦的非微扰扇区在低能有效作用量中引入对弦标度α'的显式依赖。

英文摘要:

In this paper we explicitly obtain the leading corrections to the SU(N) N=2 prepotential due to stringy instantons both in flat space-time and in the presence of a non-trivial graviphoton background field. We show that the stringy corrections to the prepotential are expressible in terms of the elementary symmetric polynomials. For N>2 the theory is not conformal; we discuss the introduction of an explicit dependence on the string scale α' in the low-energy effective action through the stringy non-perturbative sector.

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