Particle Theory at the Higgs Centre

希格斯中心的粒子理论

• 批准号: ST/T000600/1
• 负责人: Richard Ball
• 金额: $ 163.09万
• 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: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FT000600%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 fundamental level is at the crossroads. In 2012, the LHC at CERN collided protons at higher energies than ever before, and observed sufficient collisions to find a significant excess, consistent with the Higgs boson of the SM. Over recent years it has become evident that this is indeed a SM Higgs, responsible for generating masses for vector bosons, leptons and quarks. Currently data at even higher energies is being taken at LHC, and it should soon become clearer whether there is more physics at the TeV scale, or whether we need to build machines capable of going to even higher energies. At large scales the European Planck satellite has given the most precise measurements of the cosmic microwave background (CMB) and it is an open question to determine the particle physics model best capable of describing the physics underlying the large scale properties of the Universe. In 2016 the detection of gravitational waves was announced by LIGO, marking the start of a new chapter in astrophysics. Thus at both small and large scales, this is a transformative time in fundamental physics.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 signals expected 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 by 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 observable cosmological consequences of String Theory, to studying how the geometrical notions on which GR is predicated change at very small ("stringy") distance scales. The group is also engaged in using these theories to improve calculations in existing field theories. Recent discoveries of relationships between QCD amplitudes and GR, known as the 'double copy', offer new insight into gravitational phenomena.In summary, our research will impinge on both theoretical and computational aspects relevant to probing the phenomenology of 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 physics itself.

本质上有两种类型的基本力：那些负责亚原子尺度上粒子相互作用的人和负责宇宙大小结构的粒子相互作用。前者由量子场理论（QFT）（例如标准模型（SM））描述。目前，我们对自然的理解最基本的是十字路口。 2012年，CERN的LHC比以往更高的能量碰撞质子，并观察到足够的碰撞以发现显着的过量，这与SM的Higgs玻色子一致。近年来，已经很明显，这确实是一个sm higgs，负责为矢量玻色子，瘦素和夸克产生质量。目前，LHC正在采用更高能量的数据，是否在TEV量表上有更多物理学，或者我们是否需要制造能够达到更高能量的机器。在很大程度上，欧洲普朗克卫星对宇宙微波背景（CMB）进行了最精确的测量，这是一个开放的问题，是确定粒子物理模型最能够描述宇宙大规模特性的物理学的粒子物理模型。在2016年，Ligo宣布了引力波的检测，标志着天体物理学的新章节的开始。因此，在小规模和大尺度上，这是基本物理学的变革时期。爱丁堡的希格斯理论物理中心的研究计划旨在在这些新发现的最前沿：确实，彼得·希格斯本人是这里的名誉教授。具体而言，我们使用笔和纸以及最强大的超级计算机提供理论计算，这是由于已知的物理学而在LHC上看到的大量背景过程，以及在各种新物理学模型中预期的微小信号，以区分信号和背景，从而最大程度地提高LHC的发现潜力。同时，我们将尝试理解可能开始出现的所有自然力量的更完整的画面。爱因斯坦的一般相对论（GR）描述了负责大规模结构的基本力。在过去的三十年中，弦理论已成为一个概念丰富的理论框架，并核对GR和QFT。字符串理论的低能量极限是超级强度（Sugra），这是GR的非平凡扩展，其中宇宙由带有其他几何数据的时空描述。该小组的成员具有开创性的方法来推导弦理论的可观察到的宇宙学后果，以研究如何在很小（“ stricty”）距离尺度下进行GR的几何概念。该小组还从事使用这些理论来改善现有现场理论的计算。 QCD振幅与GR之间关系的最新发现，被称为“双复制”，为引力现象提供了新的见解。总而言之，我们的研究将影响与探测LHC数据现象学相关的理论和计算方面，并且还将在QFT和引力的物理学方面和重力范围内的物理学和重力范围内的物理学以及Imports Impmosts Impmssimiss Impsmssimiss Imporsive Impsoms Imporsimiss Impsompssimiss Impsome Impsompssimistimiss Importimpassimantimptimentimentimentimentimentimentiment和Imposity Impsmists Imporsick Impsmistimpass。

项目成果

Pion and kaon fragmentation functions at next-to-next-to-leading order

π 和 kaon 碎片函数处于倒数第二顺序

• DOI: 10.1016/j.physletb.2022.137456
• 发表时间: 2022
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Abdul Khalek R

From positive geometries to a coaction on hypergeometric functions

从正几何到超几何函数的相互作用

• DOI: 10.1007/jhep02(2020)122
• 发表时间: 2020
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Abreu S

Self-consistent determination of proton and nuclear PDFs at the Electron Ion Collider

在电子离子对撞机上自洽确定质子和核 PDF

• DOI: 10.1103/physrevd.103.096005
• 发表时间: 2021
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Abdul Khalek R

Learning trivializing flows

学习微不足道的流程

• DOI: 10.1140/epjc/s10052-023-11838-8
• 发表时间: 2023
• 期刊: The European Physical Journal C
• 作者: Albandea D

Determination of unpolarized pion fragmentation functions using semi-inclusive deep-inelastic-scattering data

• DOI: 10.1103/physrevd.104.034007
• 发表时间: 2021-05
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Rabah Abdul Khalek;V. Bertone;E. Nocera