Tests of chameleon gravity

IF 26.3 2区 物理与天体物理 Q1 PHYSICS, PARTICLES & FIELDS
Clare Burrage, Jeremy Sakstein
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引用次数: 231

Abstract

Theories of modified gravity, where light scalars with non-trivial self-interactions and non-minimal couplings to matter—chameleon and symmetron theories—dynamically suppress deviations from general relativity in the solar system. On other scales, the environmental nature of the screening means that such scalars may be relevant. The highly-nonlinear nature of screening mechanisms means that they evade classical fifth-force searches, and there has been an intense effort towards designing new and novel tests to probe them, both in the laboratory and using astrophysical objects, and by reinterpreting existing datasets. The results of these searches are often presented using different parametrizations, which can make it difficult to compare constraints coming from different probes. The purpose of this review is to summarize the present state-of-the-art searches for screened scalars coupled to matter, and to translate the current bounds into a single parametrization to survey the state of the models. Presently, commonly studied chameleon models are well-constrained but less commonly studied models have large regions of parameter space that are still viable. Symmetron models are constrained well by astrophysical and laboratory tests, but there is a desert separating the two scales where the model is unconstrained. The coupling of chameleons to photons is tightly constrained but the symmetron coupling has yet to be explored. We also summarize the current bounds on f(R) models that exhibit the chameleon mechanism (Hu and Sawicki models). The simplest of these are well constrained by astrophysical probes, but there are currently few reported bounds for theories with higher powers of R. The review ends by discussing the future prospects for constraining screened modified gravity models further using upcoming and planned experiments.

Abstract Image

变色龙重力测试
修正引力理论,其中具有非平凡自相互作用和与物质非最小耦合的光标量-变色龙和对称理论-动态地抑制了太阳系中广义相对论的偏差。在其他尺度上,筛选的环境性质意味着这些尺度可能是相关的。筛选机制的高度非线性性质意味着它们可以避开经典的五力搜索,因此人们一直在努力设计新的和新颖的测试来探测它们,无论是在实验室还是使用天体物理对象,以及通过重新解释现有数据集。这些搜索的结果通常使用不同的参数化来表示,这使得比较来自不同探测的约束变得困难。本综述的目的是总结目前对与物质耦合的筛选标量的最新搜索,并将当前的界限转化为单个参数化来调查模型的状态。目前,通常研究的变色龙模型具有良好的约束,但较少研究的模型具有较大的参数空间区域。对称模型很好地受到天体物理学和实验室测试的约束,但在模型不受约束的两个尺度之间存在一个沙漠。变色龙与光子的耦合受到严格限制,但对称耦合尚未得到探索。我们还总结了f(R)模型的当前边界,这些模型显示变色龙机制(Hu和Sawicki模型)。其中最简单的模型受到天体物理探测器的约束,但目前很少有更高r次方的理论的约束。本文最后讨论了利用即将到来的和计划中的实验进一步约束筛选后的修正重力模型的未来前景。
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
Living Reviews in Relativity
Living Reviews in Relativity 物理-物理:粒子与场物理
CiteScore
69.90
自引率
0.70%
发文量
0
审稿时长
20 weeks
期刊介绍: Living Reviews in Relativity is a peer-reviewed, platinum open-access journal that publishes reviews of research across all areas of relativity. Directed towards the scientific community at or above the graduate-student level, articles are solicited from leading authorities and provide critical assessments of current research. They offer annotated insights into key literature and describe available resources, maintaining an up-to-date suite of high-quality reviews, thus embodying the "living" aspect of the journal's title. Serving as a valuable tool for the scientific community, Living Reviews in Relativity is often the first stop for researchers seeking information on current work in relativity. Written by experts, the reviews cite, explain, and assess the most relevant resources in a given field, evaluating existing work and suggesting areas for further research. Attracting readers from the entire relativity community, the journal is useful for graduate students conducting literature surveys, researchers seeking the latest results in unfamiliar fields, and lecturers in need of information and visual materials for presentations at all levels.
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