Precision Measurement of the Mass of the W boson

W玻色子质量的精确测量

• 批准号: 2908351
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2908351
• 关键词: Precision; Measurement; Mass; boson

Since the prediction of its existence in 1968 by Sheldon Glashow, Steven Weinberg, and Abdus Salam, the W boson has been one of the most important areas of particle physics research for several reasons. First, the decays of the W boson are a great test for lepton flavour universality through its decays to lepton-antineutrino pairs (or antilepton-neutrino pairs). Another area of investigation around the W boson is linked to its hadronic decays, as these are dependent on both the strong coupling constant and the top two rows of the CKM matrix. More recently, the measurement of the W boson mass made by the CDF collaboration has caused a great deal more interest in this area as the measurement of 80,433 9 MeV lies far outside the current accepted world average from PDG of 80,379 12 MeV. With a deviation of over 7 from the world average it is clear to see the importance of obtaining further measurements of the W mass to determine if this value from CDF is credible, which, if it were the case, would allude to, and be concrete evidence for, effects from beyond standard model physics. As such, this investigation will take advantage of the latest data from RUN 3 of the LHC at s = 13.6 TeV using the ATLAS detector to conduct a precision measurement of the W boson mass.

自从1968年谢尔顿、史蒂芬温伯格和阿卜杜勒·萨拉姆预言了W玻色子的存在以来，W玻色子一直是粒子物理学研究中最重要的领域之一。首先，W玻色子的衰变通过衰变为轻子-反中微子对（或反轻子-中微子对），是对轻子味普适性的一个很好的考验。围绕W玻色子的另一个研究领域与它的强子衰变有关，因为这些都依赖于强耦合常数和CKM矩阵的前两行。最近，由CDF合作进行的W玻色子质量的测量引起了这一领域的更多兴趣，因为80，433 9 MeV的测量值远远超出了目前公认的世界平均值80，379 12 MeV。与世界平均值的偏差超过7，很清楚地看到获得W质量的进一步测量的重要性，以确定CDF的这个值是否可信，如果是这样的话，这将暗示，并成为超越标准模型物理学的影响的具体证据。因此，这项研究将利用最新的数据从运行3的LHC在s = 13.6 TeV使用ATLAS探测器进行精确测量的W玻色子质量。