ATLAS ITk Pixel Upgrade project leader

ATLAS ITk 像素升级项目负责人

• 批准号: ST/W001276/1
• 负责人: Craig Buttar
• 金额: $ 19.53万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FW001276%2F1
• 关键词: ATLAS; ITk; Pixel; Upgrade; project

The objective of this project is to lead the construction of the Pixel detector for the ATLAS Phase-II Upgrade for operation at the High-Luminosity Large Hadron Collider (HL-LHC). The increased luminosity delivered, around a factor of 10 more than the will be delivered by 2026 by the HL-LHC to ATLAS will significantly enhance the physics programme. The Large dataset collected will allow ATLAS to make precision studies of the Higgs sector, the Standard Model of particle physics, and to extend the mass scales accessible to searches for signatures of new physics well into the TeV region. This will allow ATLAS to address many of the fundamental questions in particle physics:Is the Higgs mechanism for generating fermion and weak gauge boson masses linked, as is implied by the Standard Model? Does the Higgs mechanism limit the cross-section of vector boson scattering in the Standard Model at high energies, or is there new physics involved in electroweak symmetry breaking?Why is the Higgs boson much lighter than the Planck Mass (the hierarchy problem)?Is there a weakly interacting particle with mass of the order of the electroweak scale that could explain dark matter?Is supersymmetry (SUSY), a symmetry between bosons and fermions, realised in nature?The Pixel detector system is at the centre of the ATLAS experiment and provides crucial information for the analysis of data. The detector takes a photograph of the event and measures the momenta of the particles produced. It associates the particles from the interesting high energy events to a single vertex and can also identify longer lived particles such as b-quarks from the displaced vertices.

该项目的目标是领导ATLAS第二阶段升级的像素探测器的建设，用于在高亮度大型强子对撞机（HL-LHC）上运行。所提供的亮度增加，比2026年HL-LHC向ATLAS提供的亮度增加约10倍，这将大大增强物理学计划。收集的大型数据集将使ATLAS能够对希格斯扇区（粒子物理学的标准模型）进行精确研究，并将可用于搜索新物理特征的质量尺度扩展到TeV区域。这将使ATLAS能够解决粒子物理学中的许多基本问题：希格斯机制产生费米子和弱规范玻色子质量是否如标准模型所暗示的那样联系在一起？希格斯机制是否限制了标准模型中高能时矢量玻色子散射的截面，或者在电弱对称性破缺中是否涉及新的物理学？为什么希格斯玻色子比普朗克质量轻得多（等级问题）？是否存在一种弱相互作用的粒子，其质量与电弱尺度相当，可以解释暗物质？超对称性（SUSY），玻色子和费米子之间的对称性，在自然界中实现了吗？像素探测器系统是ATLAS实验的核心，为数据分析提供关键信息。探测器拍摄事件的照片并测量产生的粒子的动量。它将来自感兴趣的高能事件的粒子关联到单个顶点，并且还可以从位移的顶点识别更长寿命的粒子，例如b夸克。