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arXiv 2302.00655hep-thastro-ph.COgr-qc
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原初关联函数的宇宙学流

Cosmological Flow of Primordial Correlators

Denis Werth, Lucas Pinol, Sébastien Renaux-Petel

备注：
v3: version published in PRL, minor modifications, 6 pages, 3 figures
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AI总结：

提出基于追踪等时关联函数时间演化的完整方法，可系统计算任意含时相互作用理论中的树级暴胀关联函数，为无偏倚解释宇宙学观测生成理论数据。

摘要：

原初密度涨落的关联函数为探索支配宇宙最早时刻的物理规律提供了一个令人兴奋的探针。然而，计算它们的标准方法在技术上具有挑战性。因此，理论预测仅在受限类别的理论中可用。在这篇Letter中，我们提出了一种完整的方法来系统地计算树级暴胀关联函数。该方法基于追踪等时关联函数的时间演化，并能准确捕捉任何理论中的所有物理效应。这些理论在暴胀涨落层面被方便地表述，可以包含任意数量的自由度，具有任意色散关系和质量，并通过任意类型的含时相互作用耦合。我们通过在具有强混合和存在特征的理论中探索宇宙对撞机信号的特性——一个发现新高能物理的渠道——来展示这种方法的强大能力。这项工作为一个通用计划奠定了基础，以协助我们对暴胀物理的理论理解，并为无偏倚地解释即将到来的宇宙学观测生成理论数据。

英文摘要：

Correlation functions of primordial density fluctuations provide an exciting probe of the physics governing the earliest moments of our Universe. However, the standard approach to compute them is technically challenging. Theoretical predictions are therefore available only in restricted classes of theories. In this Letter, we present a complete method to systematically compute tree-level inflationary correlators. This method is based on following the time evolution of equal-time correlators and it accurately captures all physical effects in any theory. These theories are conveniently formulated at the level of inflationary fluctuations, and can feature any number of degrees of freedom with arbitrary dispersion relations and masses, coupled through any type of time-dependent interactions. We demonstrate the power of this approach by exploring the properties of the cosmological collider signal, a discovery channel for new high-energy physics, in theories with strong mixing and in the presence of features. This work lays the foundation for a universal program to assist our theoretical understanding of inflationary physics and generate theoretical data for an unbiased interpretation of upcoming cosmological observations.

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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