标题： 深入理解最高的自然尺度：有限自然性挑战暴胀动力学 显示英文标题

标题： Insights into the highest natural scale: Finite naturalness challenges inflationary dynamics

摘要： 我们将有限自然性的标准应用于一个通用的重子区，该区域与标准模型解耦的情况。唯一且不可避免的例外来自引力相互作用。我们证明引力可以使希格斯玻色子与大尺度耦合，比之前文献中讨论的著名的三圈顶夸克介导图早得多。作为应用，我们表明有限自然性不利于涉及超普朗克场位移的大场暴胀模型。相比之下，在小场区域内，实现成功的暴胀需要初始条件的大量精细调整，这与之前的结论一致。阿塔卡马宇宙学望远镜的最新数据进一步加剧了自然性和精细调整之间的张力，挑战了单场暴胀作为宇宙起源有力解释的理论鲁棒性。 显示英文摘要

摘要： We apply the criterion of finite naturalness to the limiting case of a generic heavy sector decoupled from the Standard Model. The sole and unavoidable exception to this decoupling arises from gravitational interactions. We demonstrate that gravity can couple the Higgs to the heavy scale significantly earlier than the well-known three-loop top-quark-mediated diagrams discussed in previous literature. As an application, we show that finite naturalness disfavors large-field inflationary models involving super-Planckian field excursions. In contrast, in the small-field regime, achieving successful inflation requires substantial fine-tuning of the initial conditions, in agreement with previous results. Recent data from the Atacama Cosmology Telescope further amplify the tension between naturalness and fine-tuning, challenging the theoretical robustness of single-field inflation as a compelling explanation for the origin of the universe.