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arXiv 2201.09232hep-thgr-qc
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无反常的标度对称性与引力

Anomaly-free scale symmetry and gravity

Mikhail Shaposhnikov, Anna Tokareva

AI总结:

该研究探讨共形不变性能否作为基本相互作用理论的整体对称性,证明仅平直空间中共形对称可免于量子反常,引力会将整体对称群缩减为标度不变性,并讨论了标度对称有效拉格朗日量的应用。

摘要:

在这篇《快报》中,我们探讨了共形不变性能否被视为基本相互作用理论的一种整体对称性的问题。为描述自然,该理论必须包含标度对称性的自发破缺机制。除此之外,基本理论必须包含引力,而目前所有将共形不变性推广到弯曲时空的已知方案都存在Weyl反常问题。我们证明,仅在平直空间中才能让共形对称性免于量子反常。引力的存在会将基本理论的整体对称群缩减为仅具有标度不变性。我们讨论了满足标度对称性的有效拉格朗日量可如何用于描述粒子物理现象学和宇宙学。

英文摘要:

In this Letter, we address the question of whether the conformal invariance can be considered as a global symmetry of a theory of fundamental interactions. To describe Nature, this theory must contain a mechanism of spontaneous breaking of the scale symmetry. Besides that, the fundamental theory must include gravity, whereas all known extensions of the conformal invariance to the curved space-time suffer from the Weyl anomaly. We show that conformal symmetry can be made free from the quantum anomaly only in the flat space. The presence of gravity would reduce the global symmetry group of the fundamental theory to the scale invariance only. We discuss how the effective Lagrangian respecting the scale symmetry can be used for the description of particle phenomenology and cosmology.

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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