Searches for Higgs boson pair production at the High Luminosity Large Hadron Collider (HL-LHC) with the ATLAS experiment

通过 ATLAS 实验在高光度大型强子对撞机 (HL-LHC) 中寻找希格斯玻色子对的产生

• 批准号: 1658252
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1658252
• 关键词: Searches; Higgs; boson; pair; production

The Large Hadron Collider (LHC) at CERN will be undergoing an upgrade at the end of 2022 which will increase its delivered energy and probe the new energy frontier. The Higgs boson self coupling is an important parameter predicted by the standard model of particle physics that is still yet to be discovered. This study looks for di-Higgs production in the promising bbyy final state, with one Higgs decaying to a b and anti-b quark and the 2nd to a pair of photons. I have developed a method based on weights to exploit the low statistics available. Also implemented a Boosted Decision Tree (BDT) to further increase the chance of detecting the HH->bbyy signal from the huge backgrounds expected at the HL-LHC.

欧洲核子研究中心的大型强子对撞机(LHC)将于2022年底进行升级，这将增加其输送的能量，并探索新的能源前沿。希格斯玻色子自耦合是粒子物理标准模型预测的一个重要参数，目前仍未被发现。这项研究寻找在有希望的bbyy终态中产生双希格斯，其中一个希格斯衰变为b夸克和反b夸克，第二个希格斯衰变为一对光子。我开发了一种基于权重的方法，以利用现有的低统计数据。还实施了增强决策树(BDT)，以进一步增加从预计在HL-LHC上出现的巨大背景中检测到HH-GT；bbyy信号的机会。