Absence of one-loop effects on large scales from small scales in non-slow-roll dynamics

IF 5.4 1区 物理与天体物理 Q1 Physics and Astronomy
Jacopo Fumagalli
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引用次数: 0

Abstract

We question the existence of one-loop corrections to the large-scale power spectrum from small-scale modes in non-slow-roll dynamics which are not volume suppressed by the ratio of the short to long distance scales. One-loop contributions proportional to the long wavelength tree-level power spectrum, and not sharing this suppression, have appeared in studies involving interactions singled out by the non-slow-roll dynamics. In this context, we show the relevance of seemingly irrelevant interactions terms, such as the one provided by total derivative terms (boundary terms), and how they equally lead to non-volume suppressed contributions and exact cancellations.

非慢滚动力学中小尺度单环效应在大尺度上的缺失
我们质疑在非慢滚动力学中,小尺度模式对大尺度功率谱的单环修正是否存在,这种修正不受短距离尺度与长距离尺度之比的体积抑制。单环贡献与长波树级功率谱成正比,而不共享这种抑制,已经出现在涉及非慢滚动力学单独的相互作用的研究中。在这种情况下,我们展示了看似无关的相互作用项的相关性,例如由总导数项(边界项)提供的相互作用项,以及它们如何同样导致非体积抑制贡献和精确抵消。
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来源期刊
Journal of High Energy Physics
Journal of High Energy Physics 物理-物理:粒子与场物理
CiteScore
10.30
自引率
46.30%
发文量
2107
审稿时长
1.5 months
期刊介绍: The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).
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