Cosmological implications of electroweak vacuum instability

电弱真空不稳定性的宇宙学意义

• 批准号: 2119395
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2119395
• 关键词: Cosmological; implications; electroweak; vacuum; instability

The Standard Model of particle physics predicts, for the measured values of the Higgs boson and top quark masses, that the current vacuum state of the Universe is not the true ground state. Ultimately, after a very long time, the Higgs field will tunnel in to the true negative-energy vacuum, creating a bubble inside which space collapses into a singularity. The obvious fact that this did not happen in the early Universe places constraints on theories of cosmology and particle physics. This project will compute in a robust way the probability of vacuum decay at different stages in the early Universe, including inflation, preheating, and the hot radiation-dominated phase. The computation will include the whole particle spectrum of the Standard Model and effects of the spacetime curvature. The results will be used to constrain the Standard Model of particle physics, especially the value of the non-minimal coupling of the Higgs field to the spacetime curvature, as well as extensions of the Standard Model, and different inflationary scenarios.

粒子物理学的标准模型预测，对于希格斯玻色子和顶夸克质量的测量值，宇宙当前的真空状态不是真正的基态。最终，经过很长一段时间，希格斯场将进入真正的负能量真空，创造一个气泡，其中空间坍缩成一个奇点。这一明显的事实并没有在早期宇宙中发生，这对宇宙学和粒子物理学理论造成了限制。该项目将以稳健的方式计算早期宇宙不同阶段的真空衰变概率，包括膨胀，预热和热辐射主导阶段。计算将包括标准模型的整个粒子谱和时空曲率的影响。结果将被用来约束粒子物理学的标准模型，特别是希格斯场与时空曲率的非最小耦合的值，以及标准模型的扩展和不同的暴胀情景。

项目成果

Vacuum decay constraints on the Higgs curvature coupling from inflation

• DOI: 10.1088/1475-7516/2021/03/077
• 发表时间: 2020-11
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: A. Mantziris;T. Markkanen;A. Rajantie