无标度Brans-Dicke引力中的动态暗能量

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-10-03 DOI:10.1016/j.physletb.2025.139932

Muzi Hong , Kyohei Mukaida , Tsutomu T. Yanagida

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引用次数: 0

摘要

我们在无标度Brans-Dicke引力中增加了一个新的标量场，并要求它与原Brans-Dicke引力中的标量场具有全局的O(2)对称性。这给了我们一个新的无质量标量场在爱因斯坦坐标系中由于SO(2)对称性。然后我们显式地将O(2)对称打破为D4对称，并且这个标量场获得一个周期势。这个标量场可以作为解释暗能量的精粹场。如果我们进一步在希格斯场中加入R2项和非极小耦合，我们可以实现膨胀和再加热，这将导致精质势的超普朗克衰变常数。根据最近的一项分析，超级普朗克衰变常数与新发布的观测数据一致。

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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Dynamical dark energy in the no-scale Brans–Dicke gravity

We add a new scalar field in the no-scale Brans-Dicke gravity and require it to have a global O(2) symmetry with the original scalar field in the Brans-Dicke gravity. This gives us a new massless scalar field in the Einstein frame due to the SO(2) symmetry. We then explicitly break the O(2) symmetry to a

D_{4}

symmetry, and this scalar field gains a periodic potential. This scalar field can serve as the quintessence field to explain dark energy. If we further add the

R^{2}

term and the non-minimal coupling to the Higgs field, we can realize inflation and reheating, and this leads to a super-Planckian decay constant of the quintessence potential. The super-Planckian decay constant is consistent with the newly released observational data according to a recent analysis.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.