South-Eastern Particle Theory Alliance Sussex - RHUL - UCL 2020-2023 - UCL Node

这项拟议的研究加入了苏塞克斯大学、皇家霍洛威大学和伦敦大学学院粒子理论小组的科学家们的行列，在四个大标题下寻找新的物理：对撞机和低能量现象学：大型强子对撞机将基本粒子的速度提高到接近光速，使它们的有效质量增加了10亿倍。通过将这些粒子粉碎在一起，将会有新的发现和新的物理理论需要检验。我们将致力于一项复杂的任务，将这些碰撞的碎片与理论家提出的新模型联系起来，以解释宇宙中一些最令人困惑的问题--质量的起源是什么？有没有引力的量子理论？粒子天体物理学和宇宙学：过去十年最活跃的研究领域之一是粒子物理学和宇宙学之间的交界点。为了了解宇宙的历史，我们必须了解大爆炸初期的物理定律，当时温度和粒子能量都很大。相反，通过对今天宇宙的详细观察，我们可以追溯到条件，并对高能下的物理定律做出推断。我们的研究将解决有关宇宙的重大问题：为什么物质比反物质多？中微子和暗物质的本质是什么？我们能用引力波观测宇宙的最初几皮秒吗？新的量子技术如何被用来搜索暗物质和其他看不见的粒子？量子理论和引力如何结合在一起？我们能在宇宙中看到它们的联合效应吗？量子场论的不动点：最近的发现是，类似标准模型的理论可以是基本的和预测的，直到最高能量，而不是渐近自由的，这打开了一扇通往未知领域的大门。这些新颖的理论为UV完善标准模型提供了替代方法，并从一个全新的角度解决了它的开放挑战。我们的研究将集中于对这些新类型理论的系统评估，包括构建超越标准模型的基准模型。我们将这些研究与我们对广义相对论量子版本的持续探索结合在一起。这些情景的预测将与粒子对撞机和宇宙学的数据形成对比。高能物理工具：高光度大型强子对撞机(HL-LHC)被宣布为欧洲粒子物理战略的首要任务，并将在未来十年主导对撞机物理。这一科学领域的目的是为现象上相关的BSM情景改进工具，以便它们满足HL-LHC的需要。

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 four 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 and cosmology. 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? can we use gravitational waves to look at the first picoseconds of the Universe? how can the new quantum technology be used to search for dark matter and other invisible particles? and how can quantum theory and gravity be combined, and can we see their joint effects in the cosmos?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.Tools for high energy physics:The high-luminosity LHC (HL-LHC) was announced as top priority of the European Strategy for Particle Physics and will dominate collider physics in the next decade. The aim of this science area is to improve tools for phenomenologically relevant BSM scenarios so that they meet the needs of the HL-LHC.