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arXiv 1012.4353hep-thgr-qchep-ph
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关于规管联轴器重力修正的解释

On the Interpretation of Gravitational Corrections to Gauge Couplings

John Ellis, Nick E. Mavromatos

摘要:

最近的几篇论文讨论了引力修正的规范耦合,依赖于二次的能量。在背景场方法的框架中,这些一般对应于在场强中增加二次有效作用项,但具有高阶时空导数。我们观察到,这样的条款可以删除适当的本地字段重新定义,并没有贡献的物理散射矩阵元素。我们在开放弦论的背景下说明了这一观察,其中的有效作用包括,除其他条款外,著名的玻恩-因菲尔德形式的非线性电动力学。我们的结论是,二次能量依赖的引力修正是\emph{not}物理的,在这个意义上,有助于运行的物理可测的规范耦合,或统一的耦合在弦论。

英文摘要:

Several recent papers discuss gravitational corrections to gauge couplings that depend quadratically on the energy. In the framework of the background-field approach, these correspond in general to adding to the effective action terms quadratic in the field strength but with higher-order space-time derivatives. We observe that such terms can be removed by appropriate local field redefinitions, and do not contribute to physical scattering-matrix elements. We illustrate this observation in the context of open string theory, where the effective action includes, among other terms, the well-known Born-Infeld form of non-linear electrodynamics. We conclude that the quadratically energy-dependent gravitational corrections are \emph{not} physical in the sense of contributing to the running of a physically-measurable gauge coupling, or of unifying couplings as in string theory.

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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