New measurement of the weak mixing angle

弱混合角的新测量

• 批准号: 2908000
• 金额: --
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2908000
• 关键词: New; measurement; weak; mixing; angle

This project will measure the fundamental physics parameter of the Standard Model ofParticle Physics - the weak mixing angle. This parameter controls the mixing of the weakfields and is related to the masses of the W and Z bosons. The measurement will analysethe Run2 and Run3 data from the ATLAS experiment at CERN's Large Hadron Collider. Themethodology will be to perform a high precision measurement of the Z boson production inthe observable of the leptonic decay angle. This observable can be used to construct aso-called forward-backward asymmetry of the Z boson decays. The measured asymmetry will befitted to extract the weak mixing angle. The fits will also simultaneously constrain theproton's parton density functions which are the largest source of systematic uncertainty.This measurement is anticipated to reach an accuracy that is competitive to earlier leptoncollider results, and will be ground-breaking in achieving this at a hadron collider forthe first time.

该项目将测量粒子物理学标准模型的基本物理参数 - 弱混合角。该参数控制弱场的混合，并与W和Z实量的质量有关。该测量将分析来自CERN大型强子对撞机的Atlas实验中的Run2和Run3数据。 TheSthodology将在可观察到的Leptonic衰减角度对Z玻色子产生进行高精度测量。可观察到的可观察到的Z玻色子衰变的ASO ASO前后不对称性。测得的不对称性将适合提取弱混合角。拟合还将同时限制Proton的Parton密度函数，这是最大的系统不确定性来源。预计该测量值将达到与早期LeptonCollider结果竞争的准确性，并且将在Hadron Collider上首次实现这一目标。