arXiv 2012.066372020-12-11hep-phastro-ph.COhep-ex

$U(1)_X$ Higgs暴胀宇宙学数据的低能意义

Low energy implications of cosmological data in $U(1)_X$ Higgs inflation

Shinsuke Kawai, Nobuchika Okada, Satomi Okada

备注：: 10 pages, 5 figures
发表信息：: Phys. Rev. D 103, 035026 (2021)
DOI：: 10.1103/PhysRevD.103.035026

摘要：

具有科尔曼-温伯格型有效势的标量场出现在粒子物理的各种背景中，并作为讨论宇宙暴胀的有用框架。根据最近基于马尔可夫链蒙特卡罗分析的研究，这种有效势的系数受到宇宙学数据的严格限制。我们研究了这一观测对标准模型之外的物理学的影响，重点是基于$U(1)_X$扩展的标准模型的暴胀模型作为一个很好的例子。我们研究了大型强子对撞机（LHC）Run-2在139 fb ${}^{-1}$积分亮度上未排除的参数区域，并表明在不久的将来，模型参数可以进一步受到高光度LHC实验的约束。我们还评论可能的再加热机制和暗物质候选人的这种情况。

英文摘要：

A scalar field having the Coleman-Weinberg type effective potential arises in various contexts of particle physics and serves as a useful framework for discussing cosmic inflation. According to recent studies based on the Markov chain Monte Carlo analysis, the coefficients of such an effective potential are severely constrained by the cosmological data. We investigate the impact of this observation on the physics beyond the Standard Model, focusing on an inflationary model based on the $U(1)_X$-extended Standard Model as a well-motivated example. We examine the parameter region that is not excluded by the Large Hadron Collider (LHC) Run-2 at 139 fb${}^{-1}$ integrated luminosity, and show that the model parameters can be further constrained by the High-Luminosity LHC experiments in the near future. We also comment on the possible reheating mechanism and the dark matter candidates of this scenario.

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