Ruling Out Inflation Driven by a Power Law Potential: Kinetic Coupling Does Not Help

IF 1.2 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Gravitation and Cosmology Pub Date : 2022-11-25 DOI:10.1134/S0202289322040028

N. A. Avdeev, A. V. Toporensky

引用次数: 4

Abstract

We demonstrate that the latest constraints on inflationary observables, namely, the tensor-to-scalar ratio \(r\) and the scalar spectral index \(n_{S}\) from the Cosmic Background Radiation (CMB) observations are already strong enough to rule out the model of a scalar field with a power law potential even in the presence of kinetic coupling to gravity with a positive coupling constant. The case for a negative coupling constant needs a special treatment.

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排除由幂律势驱动的暴胀:动力耦合没有帮助

我们证明了对暴胀观测的最新约束，即来自宇宙背景辐射(CMB)观测的张量与标量比\(r\)和标量谱指数\(n_{S}\)已经足够强，即使在与重力存在正耦合常数的动力学耦合的情况下，也可以排除具有幂律势的标量场模型。对于负耦合常数的情况需要特殊处理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-

CiteScore

1.70

自引率

22.20%

发文量

审稿时长

>12 weeks

期刊介绍： Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoplesâ€™ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community