arXiv 1807.075782018-07-19hep-phastro-ph.CO

不可恢复的电弱对称性

Unrestored Electroweak Symmetry

Patrick Meade, Harikrishnan Ramani

备注：: 7 pages, 4 figures
发表信息：: Phys. Rev. Lett. 122, 041802 (2019)
DOI：: 10.1103/PhysRevLett.122.041802

摘要：

我们宇宙的宇宙学历史通常假设是，在早期和高温下，宇宙经历了电弱相变（EWPT）。假设存在一个EWPT，并根据它的强度，它对重子生成、引力波和宇宙的一般演化有许多意义。然而，并不是所有在零温下自发破缺的对称性都能在高温下恢复。特别是“逆对称破缺”的概念早已在标量理论中建立，并有微扰和晶格计算的证据。在这封信中，我们证明，与一个简单的扩展的SM，它是可能的，电弱（EW）对称性总是被打破或只是暂时通过一个对称性恢复阶段。这些新的相历史有许多宇宙学和对撞机的影响，我们讨论。这里提出的模型作为一个有用的基准比较，未来试图辨别我们的宇宙在$T\gtrsim$几个GeV的阶段。

英文摘要：

The commonly assumed cosmological history of our universe is that at early-times and high-temperatures the universe went through an ElectroWeak Phase Transition (EWPT). Assuming an EWPT, and depending on its strength, there are many implications for baryogenesis, gravitational waves, and the evolution of the universe in general. However, it is not true that all spontaneously broken symmetries at zero-temperature are restored at high-temperature. In particular the idea of "inverse symmetry breaking" has long been established in scalar theories with evidence from both perturbative and lattice calculations. In this letter we demonstrate that with a simple extension of the SM it is possible that the ElectroWeak (EW) symmetry was always broken or only temporarily passed through a symmetry restored phase. These novel phase histories have many cosmological and collider implications that we discuss. The model presented here serves as a useful benchmark comparison for future attempts to discern the phase of our universe at $T\gtrsim$ a few GeV.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文