Particle Theory at the Higgs Centre

希格斯中心的粒子理论

• 批准号: ST/L000458/1
• 负责人: Richard Ball
• 金额: $ 244万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FL000458%2F1
• 关键词: Particle; Theory; Higgs; Centre

There are two types of fundamental forces in Nature: those responsible for particle interactions at subatomic scales and those responsible for the large scale structure of the universe. The former is described by Quantum Field Theories (QFT) such as the Standard Model(SM). Currently, our understanding of Nature at the most fundamentallevel is at the crossroads. Last year, the LHC at CERN collided protons at higher energies than ever before, and observed sufficient collisions to find a significant excess at 125 GeV,consistent with the Higgs boson of the SM. Over the coming years it should becomeclear whether this is indeed a SM Higgs, responsible for generating masses for vector bosons, leptons and quarks, or whether it is something different. It should also become clearer whether there is more physics at the TeV scale, or whether this is it. In either event, it is clear that this will be a transformative period in fundamental physics, making the next few years the most exciting time for a generation or more. Our programme of research at the Higgs Centre for Theoretical Physics in Edinburgh is designed to be at the forefront of these new discoveries: indeed Peter Higgs himself is Emeritus Professor here. Specifically, we provide theoretical calculations, using pen and paper, and the most powerful supercomputers, of both the huge number of background processes to be seen at LHC due to known physics, and the tiny signalsexpected in various models of new physics, in order to discriminate between signal and background, and thus maximise the discovery potential of the LHC. In parallel, we will attempt to understand the more complete picture of all the forces of Nature that may begin to emerge. The fundamental force responsible for large scale structure is described Einstein's General Theory of Relativity (GR). During the last three decades, string theory has emerged as a conceptually rich theoretical framework reconciling both GR and QFT. The low-energy limit of String Theory is supergravity (SUGRA), a nontrivial extension of GR in which the universe is described by a spacetime with additional geometric data. Members of the group have pioneered approaches to deriving observablecosmological consequences of String Theory, to studying how the geometrical notions on which GR is predicated change at very small ("stringy") distance scales, and the systematic classification of SUGRA backgrounds. The group is also engaged in using these theories to improve calculations in existing field theories. In summary, our research will impinge on both theoretical and computational aspects relevant to probing the phenomenology of incoming LHC data, and will also encompass a wide range of topics in QFT and gravitational aspects of String Theory, impinging on cosmology, particle physics and on the very nature of String Theory itself.

自然界中有两种基本力：一种负责亚原子尺度上的粒子相互作用，另一种负责宇宙的大尺度结构。前者由量子场论（QFT）如标准模型（SM）来描述。目前，我们对自然最基本的认识正处于十字路口。去年，欧洲核子研究中心（CERN）的大型强子对撞机（LHC）以比以往更高的能量碰撞质子，并观察到足够的碰撞，发现125 GeV的能量明显过剩，与SM的希格斯玻色子一致。在接下来的几年里，我们应该弄清楚这是否确实是一个负责产生矢量玻色子、轻子和夸克质量的SM希格斯粒子，或者它是不是别的什么东西。在TeV尺度上是否有更多的物理现象，或者是否就是这样，也应该变得更加清楚。无论哪种情况，很明显，这将是基础物理学的一个变革时期，使未来几年成为一代人或更多人最激动人心的时期。我们在爱丁堡希格斯理论物理中心的研究项目旨在走在这些新发现的前沿：事实上，彼得·希格斯本人就是这里的名誉教授。具体来说，我们提供理论计算，使用笔和纸，以及最强大的超级计算机，对已知物理在大型强子对撞机中看到的大量背景过程，以及在各种新物理模型中预期的微小信号，以便区分信号和背景，从而最大限度地提高大型强子对撞机的发现潜力。与此同时，我们将试图了解可能开始出现的所有自然力量的更完整的图景。爱因斯坦的广义相对论（GR）描述了造成大规模结构的基本力。在过去的三十年里，弦理论已经成为一个概念丰富的理论框架，它调和了广义相对论和量子力学。弦理论的低能量极限是超重力（SUGRA），这是广义相对论的非平凡扩展，其中宇宙是由具有附加几何数据的时空来描述的。该小组的成员率先采用了一些方法来推导弦理论的可观测宇宙学结果，研究在非常小的（“弦”）距离尺度下预测GR的几何概念是如何变化的，以及对SUGRA背景的系统分类。该小组还致力于利用这些理论来改进现有场论的计算。总之，我们的研究将涉及与探测LHC传入数据的现象学相关的理论和计算方面，并且还将涵盖弦理论的QFT和引力方面的广泛主题，涉及宇宙学，粒子物理学和弦理论本身的本质。

项目成果

Z/?* plus multiple hard jets in high energy collisions

Z/?* 加上高能碰撞中的多个硬射流

• DOI: 10.1007/jhep05(2016)136
• 发表时间: 2016
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Andersen J

Kinematical lie algebras in 2 + 1 dimensions

2 1 维运动李代数

• DOI: 10.1063/1.5025785
• 发表时间: 2018
• 期刊: Journal of Mathematical Physics
• 影响因子: 1.3
• 作者: Andrzejewski T

Higgs-boson plus dijets: higher-order matching for high-energy predictions

希格斯玻色子加双喷射：高能预测的高阶匹配

• DOI: 10.1007/jhep08(2018)090
• 发表时间: 2018
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Andersen J

From multiple unitarity cuts to the coproduct of Feynman integrals

从多重酉割到费曼积分的余积

• DOI: 10.1007/jhep10(2014)125
• 发表时间: 2014
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Abreu S

Update of the Binoth Les Houches Accord for a standard interface between Monte Carlo tools and one-loop programs

• DOI: 10.1016/j.cpc.2013.10.020
• 发表时间: 2014-02-01
• 期刊: COMPUTER PHYSICS COMMUNICATIONS
• 影响因子: 6.3
• 作者: Alioli, S.;Badger, S.;Zaro, M.
• 通讯作者: Zaro, M.