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arXiv 2603.09438hep-thastro-ph.COhep-ph
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德西特空间有效理论中无质量标量关联函数的重整化与匹配

Renormalisation and matching of massless scalar correlation functions in Soft de Sitter Effective Theory

Technische Universität München(慕尼黑工业大学);CERN(欧洲核子研究组织);Universidad de Granada(格拉纳达大学)

Martin Beneke, Patrick Hager, Andrea F. Sanfilippo

AI总结:

本文通过构建软德西特有效理论,验证其在无质量标量场量子动力学中的有效性,实现了重整化和匹配过程。

摘要:

对于轻质量和无质量标量场,宇宙学关联函数遭受红外发散和 secular 对数。软德西特有效理论(SdSET)由 Cohen 和 Green 提出,作为描述德西特空间中长波长模式 $k_{\rm phys} < H$ 非平凡动力学的有效描述,负责红外和晚期时间对数,并作为随机方法的系统扩展。在本文中,我们用维数正规化构建 SdSET,包括初始条件函数。通过实例证明,重整化和匹配在平坦空间有效场论中同样适用。采用无质量 $κϕ^4$ 理论作为紫外理论,我们将树级三谱和六点函数,以及一阶循环功率谱匹配到 SdSET,明确验证 SdSET 是超视界模式量子动力学的适当有效场论。

英文摘要:

For light and massless scalar fields, cosmological correlation functions suffer from infrared divergences and secular logarithms. Soft de Sitter Effective Theory (SdSET) has been proposed by Cohen and Green as the effective description of the non-trivial dynamics of long-wavelength modes $k_{\rm phys} < H$ in de Sitter space, which is responsible for the infrared and late-time logarithms, and as a systematic extension of the stochastic approach. In this article, we construct SdSET in dimensional regularisation, including an initial-condition functional. We demonstrate by examples that renormalisation and matching works as for flat-space effective field theories. Adopting massless $κϕ^4$ theory as the UV theory, we match the tree-level trispectrum and six-point function, and the one-loop power spectrum to SdSET, verifying explicitly that SdSET is the appropriate effective field theory for the quantum dynamics of superhorizon modes.

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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