Research in particle physics phenomenology

粒子物理现象学研究

• 批准号: 1888177
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1888177
• 关键词: Research; particle; physics; phenomenology

At the Large Hadron Collider protons are brought into collision with unprecedented energy to unravel fundamental questions of nature, e.g. what is the origin of mass, what is matter made of or what is the basic underlying theory to describe nature? To answer these questions it is of paramount importance to be able to separate rare signal events, induced by new physics, from the large Standard Model backgrounds. Most of the proposed new physics scenarios result in signatures with many objects in the final state, e.g. jets and leptons. However, because of the large collision energy Standard Model processes are likely to produce final states with many jets and leptons as well. Therefore, a precise calculation of these backgrounds is important for searches of new particles and measurements of new particle's properties. The aim of this theoretical project is to improve predictions for production processes by including vector bosons and many jets. For this purpose next-to-leading order (NLO) corrections have to be included in the calculation. The tool commonly used are flexible Monte Carlo programs. Because of its immediate importance for measurements at the LHC's experiments a strong interaction with experimental collaborations is expected.

在大型强子对撞机中，质子与前所未有的能量发生碰撞，以解开自然界的基本问题，例如质量的起源是什么，物质是由什么组成的，或者描述自然的基本潜在理论是什么？为了回答这些问题，能够从大型标准模型背景中分离出由新物理学引起的罕见信号事件是至关重要的。大多数提出的新物理场景都会导致许多物体处于最终状态的特征，例如喷流和轻子。然而，由于巨大的碰撞能量，标准模型过程也可能产生具有许多喷流和轻子的最终状态。因此，精确计算这些背景对于寻找新粒子和测量新粒子的性质是很重要的。这个理论项目的目的是通过包括矢量玻色子和许多喷流来改进对生产过程的预测。为此，计算中必须包括次领先顺序（NLO）修正。常用的工具是灵活的蒙特卡罗程序。由于它对大型强子对撞机实验测量的直接重要性，因此预计它将与实验合作产生强烈的相互作用。