arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.0285hep-th
收藏

F理论中规范耦合的通量和翘曲

Fluxes and Warping for Gauge Couplings in F-theory

Thomas W. Grimm, Denis Klevers, Maximilian Poretschkin

摘要:

我们使用M-理论对偶描述计算四维F-理论有效作用量中的通量相关修正。在M-理论中,7-膜通量用四形式通量编码,并修正了背景几何和Kaluza-Klein约化分析。特别是,通量源的翘曲因子,这也取决于四倍紧化的环面方向。这种依赖性在四维作用量的推导中是至关重要的,尽管环面纤维在F理论中是辅助的。在M-理论中,7-膜被描述为一个无限排列的Taub-NUT空间。我们使用这种几何上的显式度量来导出局部校正的翘曲因子和M-理论三自封闭表达式。我们专注于贡献的7膜规范耦合函数从这个M-理论的反反应,并表明,在内部七膜通量二次项诱导。规范耦合函数的实部用M理论翘曲因子修正,虚部用修正的M理论三型势修正。所得到的贡献匹配已知的弱弦耦合的结果,但也产生额外的条款抑制在弱耦合。这表明,M理论约化的完成为在远离弱弦耦合极限的真正F理论中计算各种修正开辟了道路。

英文摘要:

We compute flux-dependent corrections in the four-dimensional F-theory effective action using the M-theory dual description. In M-theory the 7-brane fluxes are encoded by four-form flux and modify the background geometry and Kaluza-Klein reduction ansatz. In particular, the flux sources a warp factor which also depends on the torus directions of the compactification fourfold. This dependence is crucial in the derivation of the four-dimensional action, although the torus fiber is auxiliary in F-theory. In M-theory the 7-branes are described by an infinite array of Taub-NUT spaces. We use the explicit metric on this geometry to derive the locally corrected warp factor and M-theory three-from as closed expressions. We focus on contributions to the 7-brane gauge coupling function from this M-theory back-reaction and show that terms quadratic in the internal seven-brane flux are induced. The real part of the gauge coupling function is modified by the M-theory warp factor while the imaginary part is corrected due to a modified M-theory three-form potential. The obtained contributions match the known weak string coupling result, but also yield additional terms suppressed at weak coupling. This shows that the completion of the M-theory reduction opens the way to compute various corrections in a genuine F-theory setting away from the weak string coupling limit.

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。

↑