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arXiv 1012.1118hep-phhep-th
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弱电精密物理中的渐近安全引力子

Asymptotically Safe Gravitons in Electroweak Precision Physics

Erik Gerwick

摘要:

渐近安全提供了一个场论为基础的UV完成重力。在低普朗克尺度下,引力对低能精密观测量的影响不可忽略。我们计算的贡献的ρ参数渐近安全的引力子,并发现,在有效的理论相比,超过三个额外的维度模型的约束显着减弱。反普朗克贡献的相对大小与额外维度的数量成比例地增加。

英文摘要:

Asymptotic safety offers a field theory based UV completion to gravity. For low Planck scales, gravitational effects on low-energy precision observables cannot be neglected. We compute the contribution to the rho parameter from asymptotically safe gravitons and find that in contrast to effective theory, constraints on models with more than three extra dimensions are significantly weakened. The relative size of the trans-Planckian contribution increases proportional to the number of extra dimensions.

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