Searches for Higgs pair production with the ATLAS Experiment at the LHC

通过 LHC 的 ATLAS 实验寻找希格斯对的产生

• 批准号: 2899325
• 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-2899325
• 关键词: Searches; Higgs; pair; production; ATLAS

The discovery of Higgs boson was announced by the ATLAS and the CMS collaborations in 2012 and since then a substantial progress has been made measuring its properties, including mass, spin and couplings to other particles. However, the ultimate test of electroweak symmetry breaking (ESWB) can only be obtained by reconstructing the characteristic Mexican-hat-shaped potential. Measurement of the Higgs self-coupling via production of Higgs boson pairs provides a unique direct probe of this potential, giving a key handle on many of the open questions in the Standard Model.The cross section of Di-Higgs production is about 1000 times smaller than the single Higgs production cross section. The analysis will be using data from ATLAS detector during Run2 and partial Run3. It will constrain the di-Higgs production cross-section and the self-coupling and set limits on various resonant and non-resonant new physics models. The analysis will use the events in which one of the Higgs decays into b-quark and the other into a pair of tau leptons and it will be focused on the channel in which both tau decay hadronically.

希格斯玻色子的发现是由ATLAS和CMS合作在2012年宣布的，从那时起，测量其性质取得了实质性进展，包括质量，自旋和与其他粒子的耦合。然而，电弱对称性破缺（ESWB）的最终检验只能通过重构特征墨西哥帽形势来实现。通过希格斯玻色子对的产生来测量希格斯玻色子的自耦合提供了一种独特的直接探测这种潜力的方法，为标准模型中许多悬而未决的问题提供了一个关键的解决方案。Di-Higgs产生的截面比单个希格斯玻色子产生的截面小1000倍。分析将使用运行2和部分运行3期间ATLAS探测器的数据。它将限制di-Higgs产生截面和自耦合，并限制各种共振和非共振新物理模型。分析将使用其中一个希格斯粒子衰变为b夸克而另一个衰变为一对τ轻子的事件，并将重点放在两个τ轻子都发生强子衰变的通道上。