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arXiv 0710.0713hep-thgr-qchep-ph
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量子引力对规范耦合运行的修正

Corrections to the running of gauge couplings due to quantum gravity

Michael Maziashvili

摘要:

关于重力对规管耦合运转的修正,有两种不同的结果。有些作者认为,单圈水平的引力修正表明了规范耦合的万有引力衰减的一个有趣效应,即无论规范耦合在没有引力的情况下如何表现,引力修正都普遍地朝着渐近自由的方向起作用,而另一些作者则完全否定了单圈水平的引力修正的存在。由于这些计算是在广义相对论的有效场论方法的框架内进行的,我们希望引起人们对最近发现的时空维运行的深刻量子引力效应的注意,这种效应不可避免地影响规范耦合的运行。时空维的运行表明,随着进入更小的尺度,维逐渐减小,它在渐近自由的方向上作用于耦合常数,因此在任何情况下都表明了这种量子引力效应的可解释性。奇怪的是,这些结果与罗宾逊和威尔切克的结果在数量上也完全一致。

英文摘要:

Concerning the gravitational corrections to the running of gauge couplings two different results were reported. Some authors claim that gravitational correction at the one-loop level indicates an interesting effect of universal gravitational decreasing of gauge couplings, that is, gravitational correction works universally in the direction of asymptotic freedom no matter how the gauge coupling behaves without gravity, while others reject the presence of gravitational correction at the one-loop level at all. Being these calculations done in the framework of an effective field theory approach to general relativity, we wanted to draw attention to a recently discovered profound quantum-gravitational effect of space-time dimension running that inevitably affects the running of gauge couplings. The running of space-time dimension indicating gradual reduction of dimension as one gets into smaller scales acts on the coupling constants in the direction of asymptotic freedom and therefore in any case manifests the plausibility of this quantum-gravitational effect. Curiously enough, the results are also in perfect quantitative agreement with those of Robinson and Wilczek.

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