Studying highly boosted Higgs bosons in the bb decay mode

研究 bb 衰变模式下高度增强的希格斯玻色子

• 批准号: 2108735
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2108735
• 关键词: Studying; highly; boosted; Higgs; bosons

The aim of the thesis is to study the transverse momentum spectrum of the Higgs boson as measured by thhe ATLAS experiment at the LHC above 400 GeV/c. In this kinematic region production would be particularly sensitive to the impact of new, undiscovered particles which might change the rate, A discovery here would provide clues to the natrualness problem - why the Higgs mass is so different from the Planck scale.The identification of such boosted Higgs bosons will require a significant overhaul of the b-tagging techniques employed by ATLAS. These assume the b quarks decay inside the beam pipe, but at these momenta half or more produce b hadrons which traverse part of the detector before decaying. Thus significant improvements are required. At present ATLAS has made no studies of this process, of this is completely new.

本论文的目的是研究在LHC上ATLAS实验测量的400 GeV/c以上的Higgs玻色子的横动量谱。在这一运动学区域，粒子的产生对新的、未被发现的粒子的影响特别敏感，这些粒子可能会改变粒子的速率。这一发现将为自然性问题提供线索--为什么希格斯粒子的质量与普朗克尺度如此不同。要识别这种增强的希格斯玻色子，需要对ATLAS使用的b标记技术进行重大改革。这些假设是B夸克在束管内衰变，但在这些动量中，一半或更多的产生B强子，它们在衰变前穿过探测器的一部分。因此，需要作出重大改进。目前ATLAS还没有对这一过程进行过研究，这是一个全新的过程。