South East Particle Theory Alliance Sussex - Royal Holloway - UCL (SEPTA)

这项提议的研究加入了苏塞克斯、皇家霍洛威和伦敦大学学院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：在能量前沿的粒子碰撞，由大型强子对撞机呈现，允许产生或排除推测的比质子重数千倍的新粒子。在强度边界，粒子相互作用的极其精确的测量允许以间接的方式探测更重的粒子。在这里，我们探索并结合这两个方向，以在比以往更小的距离上揭示世界的结构，并提出诸如：是什么使已知粒子比量子引力的普朗克质量轻得多？什么是暗物质？是否存在关于物质和力的统一理论？我们如何才能最好地利用现在和未来的实验来照亮它们？粒子天体物理学和宇宙学：在过去的十年中，最活跃的研究领域之一是粒子物理学和宇宙学之间的接口。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，我们可以追溯到当时的条件，并推断出高能的物理定律。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？我们可以用引力波来观察宇宙的第一个皮秒吗？新的量子技术如何用于寻找暗物质和其他看不见的粒子？量子理论和引力如何结合，我们能否看到它们在宇宙中的联合效应？量子场论：最近发现，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，而不需要渐进自由，这为未知领域打开了一扇门。这些新颖的理论为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其公开的挑战。我们的研究将侧重于对这些新型理论的系统评价，包括标准模型之外的基准模型的构建。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起来。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。

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:Particle collisions at the energy frontier, presented by the Large Hadron Collider, allow to produce or rule out conjectured new particles thousands of times as heavy as the proton. At intensity frontier, extremely precise measurements of particle interactions allow to probe for even heavier particles in an indirect fashion. Here we explore and combine both directions to unravel the structure of the world at smaller distances than ever, asking questions such as: what makes the known particles so much lighter than the Planck mass of quantum gravity? What is Dark Matter? Is there a unified theory of matter and forces? And how can we best use present and future experiments to shine light on them?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?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.