Probing new physics in events with two same-charge tau leptons produced in association with two jets with the ATLAS detector

Snigdho Chakraborty将在他的论文中使用欧洲核子研究中心（日内瓦，瑞士）大型强子对撞机（LHC）的ATLAS探测器收集的数据。ATLAS合作涉及来自约40个国家数百个研究所的4000多名科学家，工程师和学生。他的论文将集中于研究与喷流有关的具有相同电荷的两个轻子的事件的产生。主要目标是在两个τ轻子事件中寻找重中性轻子和其他新的物理现象。在此过程中，他必须了解这种分析的背景，并开发新的方法（包括使用深度机器学习）来减少它们并提高搜索的灵敏度。Snigdho Chakraborty还将研究与主要主题相关的过程，例如，除其他外，与两个喷流相关的相同符号W玻色子的研究，这对电弱对称性破缺机制敏感，并且尚未使用tau轻子进行测量。Snigdho Chakraborty还将为ATLAS组合性能组在触发器和喷气机以及丢失能量方面进行的工作做出贡献，以获得基于ML的喷气校准。完成这项任务将使他获得ATLAS作者的资格。

Snigdho Chakraborty will use the data collected with the ATLAS detector at the Large Hadron Collider (LHC) at CERN (Geneva, Switzerland) for his thesis. The ATLAS collaboration involves more than 4000 scientists, engineers, and students from hundreds of institutes in about 40 countries. His thesis will focus on studies of the production of events with two leptons with the same electric charge in association with jets. The primary objective is the search for Heavy Neutral Leptons and other new physics phenomena in events with two tau leptons. In doing so, he will have to understand the backgrounds to this analysis, and develop novel methods (including the use of deep machine learning) to reduce them and increase the sensitivity of the search. Snigdho Chakraborty will also work on the study of processes related to the main topic, such as, among others, that of same-sign W bosons produced in association with two jets, which is sensitive to the mechanism of Electroweak Symmetry Breaking and of which no measurement using tau leptons has been performed yet. Snigdho Chakraborty will also contribute to the effort conducted in the ATLAS Combined Performance group on Trigger and Jets and Missing Energy to derive ML-based jet calibrations. The completion of this task will lead to his qualification as an ATLAS author.