利用具有高能量的希格斯玻色子寻找超出标准模型的新物理

随着希格斯玻色子在LHC上被发现，研究希格斯玻色子性质的同时以其作为桥梁探索超出标准模型新物理是当今LHC物理研究的热点。本项目聚焦希格斯玻色子相关新物理寻找，结合ATLAS探测器在高能量区域的优势，着眼于利用高能量希格斯玻色子探索超出标准模型新物理在ATLAS实验的迹象。针对希格斯玻色子主要衰变模式（双底夸克）在高能区重建和标记的挑战，本研究拟重点优化质心系重建算法，提高其对此类过程的重建和标记效率。这项研究可以为ATLAS实验利用高能量希格斯玻色子寻找新物理的分析打下基础。本项目另一个研究重点是利用ATLAS实验在Run-III获取的数据通过高能量希格斯玻色子与光子末态寻找超出标准模型的新物理。其中包括寻找新共振态和首次在ATLAS实验利用此末态探索希格斯玻色子和光子反常耦合机制。本项目将为相关新物理的实验寻找和理论研究提供重要参考。

With the discovery of the Higgs boson in the LHC, using the Higgs boson as a bridge to search for new physics becomes the hot topic in the LHC. This project takes the advantage of extremely high collision data from the LHC and focuses on the search for new physics related to the Higgs boson by using the boosted Higgs boson in the LHC.To handle the challenges of reconstructing and tagging the boosted Higgs boson in bottom quark pair decay, this project will focus on optimizing the center-of-mass reconstruction method to improve the reconstruction and tagging efficiencies for such a process. This study will help future analyses using boosted Higgs boson. Another key topic is the search for new physics via boosted Higgs and photon final state with data collected by the ATLAS detector in Run-III. This topic includes searches for new resonance and also the anomalous coupling between the Higgs boson and the photon, where the latter is performed for the first time in ATLAS. All these results will provide very important references for future experimental and theoretical development of the Higgs boson new physics.