A Study of the Higgs boson decaying to a pair of bb quarks

希格斯玻色子衰变为一对 bb 夸克的研究

• 批准号: 2112717
• 金额: --
• 依托单位: University of Oxford
• 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-2112717
• 关键词: Study; Higgs; boson; decaying; pair

ATLAS has recently implemented a new jet algorithm using particle flow which improves the accuracy of charged-hadron measurements while retaining the calorimeter measurements for neutral-particles. Philipp will conduct studies to understand the performance of b-tagging in particle flow jets. He will work on the Monte Carlo based extrapolation of the b-tagging efficiency calibration from the ttbar data sample to the high jet pT range, for this jet category. These corrections will be incorporated in the 2019 precision calibrations (summer 2019) and the expected update (late 2019). The completion of these tasks will lead to his qualification as an ATLAS author.He will use these optimal tools to study the decay Higgs boson to a pair of b quarks with the full data sample collected by the ATLAS experiment in RUN 2 of the LHC. His work will include both resolved and boosted decays of the Higgs boson. He will implement state-of-the-art machine learning algorithms to increase the signal to background ratio in the final state containing 0-leptons. His work will lead to the best measurement of this important decay mode of the Higgs boson. He will also study the effects induced by an anomalous Higgs trilinear coupling on the totaland differential rate of VH associated production when the Higgs decays into b-quarks.

ATLAS最近利用粒子流实现了一种新的射流算法，该算法提高了带电强子测量的准确性，同时保留了对中性粒子的量热计测量。Philipp将进行研究，以了解粒子流射流中b标记的性能。他将研究基于蒙特卡罗的b标记效率校准的外推，从ttbar数据样本到高喷射pT范围，用于此喷气类别。这些修正将纳入2019年精度校准（2019年夏季）和预期更新（2019年底）。这些任务的完成将使他获得ATLAS作者的资格。他将使用这些最佳工具，利用大型强子对撞机RUN 2中ATLAS实验收集的完整数据样本，研究希格斯玻色子向一对b夸克的衰变。他的工作将包括解决和促进希格斯玻色子的衰变。他将采用最先进的机器学习算法，在包含0轻子的最终状态下增加信号与背景的比率。他的工作将导致对希格斯玻色子这一重要衰变模式的最佳测量。他还将研究当希格斯粒子衰变为b-夸克时，异常希格斯三线性耦合对VH相关产生的总速率和微分速率的影响。