Search for SM and BSM signature of 3 Higgs bosons at s = 13 TeV at the ATLAS experiment

学生将执行一个关于味标记触发器的资格任务，该任务将试图减少胶子-> B B背景过程，这是任何希格斯玻色子搜索的最大污染物，假设希格斯衰变为b夸克。我们希望在运行3开始之前有这个触发器和一个离线的“胶子否决”。这将是她博士第一年的首要任务。也将是她后续研究工作的一个极其重要的组成部分。学生将使用运行2的数据和ATLAS实验中的模拟来研究多希格斯扇区中的奇异希格斯生产。多希格斯签名都将以希格斯玻色子衰变为B夸克为特征，尽管这最终可能不是学生研究或使用的唯一衰变签名。学生也可以在ATLAS框架之外进行现象学研究，进入LHC和未来对撞机未来升级的多希格斯签名，这取决于她研究期间的确切时间表细节和数据收集。如果研究时间允许，将探索各种通道，重点是3-希格斯最终状态，其中至少有两个三个希格斯粒子衰变为b夸克。在这个学生的研究生生涯中，LHC数据采集的不确定性要求我们在她的计划上保持一定的灵活性，以便她可以按时提交。

The student will perform a Qualification Task on flavour tagging triggers which will attempt to reduce the gluon->b b background process that is the largest contaminant of any Higgs boson search with the Higgs assumed to decay to b-quarks. The hope is to have this trigger, and an offline "gluon veto" in place before Run 3 starts. This will be the highest priority for the first year of her D.Phil. and will be an extremely important component of her subsequent research work. The student will research Exotic Higgs production in the multi-Higgs sector using data from Run 2 and simulations within the ATLAS experiment. Multi-Higgs signatures will all feature the decay of the Higgs boson to b quarks although this may not end up being the only decay signature studied or used by the student. The student may also perform phenomenology studies outside the ATLAS framework into multi-higgs signatures for future upgrades of the LHC and future colliders depending on the exact schedule details and data collection during her research time. If research time allows, A variety of channels will be explored with emphasis on 3-Higgs final states where at least two of the three Higgs particles decay into b-quarks. The uncertain nature of the LHC data-taking during this student's graduate career requires that we maintain some flexibility on her programme so that she may submit on-time.