Theoretical Particle Physics at City University

城市大学理论粒子物理

基本信息

批准号：
ST/J00037X/1
负责人：
Bogdan Stefanski
金额：
$ 5.12万
依托单位：
City, University of London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FJ00037X%2F1
关键词：
Theoretical Particle Physics City University

项目摘要

With the arrival of the LHC on the Particle Physics arena, theoretical particle physics finds itself at a critical juncture. On the one hand, the last missing element of the Standard Model, the Higgs boson, needs to be found, and on the other, the LHC experiments may find new particles and processes that go beyond the standard model. At the same time, in the theoretical physics community there are a number of outstanding problems that will benefit from the information that we expect to arrive from the LHC. This project will investigate two key problems in modern theoretical physics. Firstly, we will investigate strongly coupled gauge theories using the so-called gauge/string correspondence. Four dimensional gauge theories are a central building block of modern particle physics. Yet relatively little is known analytically about their behaviour because they are not ameanable to perturbative methods - they are strongy interacting. In recent years, there have been significant breakthroughs in understanding certain gauge theories using the gauge/string correspondence. In particular, the mathematical tools known as integrability have provided an incredibly precise analytic handle on certain supersymmetric strongly interacting gauge theories. For the first time, we are able to make exact analytic statements about generic, quantum-corrected, quantities in these highly symmetric gauge theories. In this project we will develop new tools and methods to understand the strong-coupling dynamics of more realistic, less supersymmetric, gauge theories. Secondly, we will explore beyond-the-Standard-Model physics that can be obtained as a consistent low-energy theory from string theory. String theory has provided a framework for unifying gauge and gravity interactions into a single consistent quantum theory. One of the key challenges has been to identify particular examples of string theory compactifications which will lead to realistic low-energy physics. Our group will systematically search through the very large number of consistent string vacua, for those models which are consistent with the Standard Model and any new physics found by the LHC. Our past experience suggests that stringy geometries which could give the Standard Model are very rare. This in turn hints at the uniqueness, rather than the huge degeneracy, of string vacua, and we aim to extensively test this hypothesis.

随着LHC到达粒子物理领域的到来，理论粒子物理学处于关键关头。一方面，需要找到标准模型Higgs玻色子的最后一个缺失元素，另一方面，LHC实验可能会发现超出标准模型的新粒子和过程。同时，在理论物理社区中，有许多杰出的问题将受益于我们期望从LHC到达的信息。该项目将研究现代理论物理学中的两个关键问题。首先，我们将使用所谓的量规/字符串对应关系进行强烈耦合的仪表理论。四个维量表理论是现代粒子物理的中心构建基块。然而，在分析上，相对较少的关于其行为的知名度很少，因为它们与扰动方法不明相当 - 它们的相互作用很强。近年来，使用量规/字符串对应关系理解某些规格理论的突破。特别是，被称为集成性的数学工具为某些超对称性强相互作用的仪表理论提供了令人难以置信的精确分析方法。我们第一次能够在这些高度对称仪表理论中就通用，量子校正的数量进行精确的分析陈述。在这个项目中，我们将开发新的工具和方法，以了解更现实，超对称性，规格理论的强耦合动力学。其次，我们将探索超出标准的模型物理学，可以从字符串理论中获得一致的低能理论。字符串理论提供了一个将仪表和重力相互作用统一为单个一致的量子理论的框架。主要挑战之一是确定弦理论压缩的特定例子，这将导致现实的低能物理学。对于那些与标准模型和LHC发现的任何新物理学一致的模型，我们的小组将系统地搜索大量一致的字符串真空吸尘器。我们过去的经验表明，可以给标准模型的弦乐几何形状非常罕见。反过来，这暗示了弦真空的独特性，而不是巨大的堕落性，我们旨在广泛检验这一假设。