South-Eastern Particle Theory Alliance Sussex - RHUL - UCL 2017-2020 - Sussex node

东南粒子理论联盟苏塞克斯 - RHUL - UCL 2017-2020 - 苏塞克斯节点

• 批准号: ST/P000819/1
• 负责人: Stephan Huber
• 金额: $ 81.16万
• 依托单位: University of Sussex
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FP000819%2F1
• 关键词: South; Eastern; Particle; Theory; Alliance

The proposed research joins scientists of the particle theory groups at Sussex, Royal Holloway and University College London in the hunt for new physics under three broad headings:Collider and low-energy phenomenology:The Large Hadron Collider boosts elementary particles to velocities so close to that of light that their effective mass grows by a factor of a billion. By smashing these particles together there are new discoveries to be made, and new theories of physics to test. We will work on the complex task of relating the debris of these collisions to the new models put forward by theorists to explain some of the most puzzling questions of the universe - what is the origin of mass? and is there a quantum theory of gravity? Particle astrophysics and cosmology:One of the most active areas of research in the past decade has been at the interface between particle physics andcosmology. In order to understand the history of the universe we must understand physical laws in the first moments of the Big Bang, when temperatures and particle energies were huge. Conversely, by detailed observations of the universe today we can trace back the conditions and make deductions about physical laws at high energies.Our research will tackle big questions about the universe: why is there more matter than antimatter? what is the nature of neutrinos and dark matter? is there any evidence out there for strings or other cosmic defects? and can we understand the history of the universe from the epoch of inflation until the present day in one overarching theory?Fixed points of quantum field theory:The recent discovery that Standard Model-like theories can be fundamental and predictive up to highest energies without being asymptotically free has opened a door into uncharted territory. These novel theories offer alternative ways to UV complete the Standard Model and to address its open challenges from an entirely new angle. Our research will focus on the systematic evaluation of these new types of theories, including the construction of benchmark models beyond the Standard Model. We combine these studies with our continuing quest towards a quantum version of general relativity. Predictions of these scenarios will be contrasted with data from particle colliders and cosmology.

这项拟议中的研究加入了苏塞克斯、皇家霍洛威和伦敦大学学院伦敦粒子理论小组的科学家们，在三个大标题下寻找新的物理学：对撞机和低能现象学：大型强子对撞机将基本粒子的速度提高到如此接近光速，以至于它们的有效质量增加了十亿倍。通过将这些粒子碰撞在一起，将会有新的发现，新的物理理论将会得到检验。我们将致力于将这些碰撞的碎片与理论家提出的新模型联系起来的复杂任务，以解释宇宙中一些最令人困惑的问题-质量的起源是什么？有引力的量子理论吗粒子天体物理学和宇宙学：过去十年中最活跃的研究领域之一是粒子物理学和宇宙学之间的界面。为了了解宇宙的历史，我们必须了解大爆炸最初时刻的物理定律，当时温度和粒子能量都很大。相反，通过今天对宇宙的详细观察，我们可以追溯到高能状态下的条件并推导出物理定律。我们的研究将解决宇宙的大问题：为什么物质比反物质多？中微子和暗物质的本质是什么？有弦或其他宇宙缺陷的证据吗？我们能用一个包罗万象的理论来理解宇宙从暴胀时代到今天的历史吗？量子场论的不动点：最近发现，标准模型类理论可以是基本的和预测的最高能量，而不是渐近自由，这为未知领域打开了一扇大门。这些新的理论提供了替代方法来UV完成标准模型，并从一个全新的角度来解决其开放的挑战。我们的研究将集中在这些新类型的理论的系统评估，包括标准模型之外的基准模型的建设。我们将联合收割机这些研究与我们对广义相对论量子版本的持续探索相结合。对这些情景的预测将与粒子对撞机和宇宙学的数据进行对比。

项目成果

Four-lepton production in gluon fusion at NLO matched to parton showers

• DOI: 10.1140/epjc/s10052-021-09470-5
• 发表时间: 2021-02
• 期刊: The European Physical Journal C
• 作者: S. Alioli;S. F. Ravasio;J. Lindert;R. Röntsch

Thermal suppression of bubble nucleation at first-order phase transitions in the early Universe

• DOI: 10.1103/physrevd.106.023505
• 发表时间: 2022-05
• 期刊: Physical Review D
• 影响因子: 5
• 作者: M. A. Ajmi;M. Hindmarsh

Gravitational Waves at Strong Coupling from an Effective Action.

有效作用强耦合下的引力波。

• DOI: 10.1103/physrevlett.128.131101
• 发表时间: 2022
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Ares FR

Near-to-planar three-jet events at NNLL accuracy

NNLL 精度的近平面三喷流事件

• DOI: 10.1007/jhep07(2020)171
• 发表时间: 2020
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Arpino L

Effective actions and bubble nucleation from holography

全息术的有效作用和气泡成核

• DOI: 10.1103/physrevd.105.066020
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Ares F