Studying Electroweak Gauge-Boson Self-Interactions in Final States including a Z and a Photon

研究最终状态（包括 Z 和光子）的电弱规范玻色子自相互作用

• 批准号: 2322199
• 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: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2322199
• 关键词: Studying; Electroweak; Gauge; Boson; Self

This student project studies double and triple electroweak gauge boson (W,Z,photon) production in proton-proton collision data collected with the ATLAS detector. The work builds on previous measurements of Z+photon production using ATLAS data collected in 2015-2018, and will look both at processes where the Z+photon is produced by collision of electroweak bosons emitted off the constituents of the incoming protons ("vector-boson scattering") as well as production of three vector bosons including Z, photon and another electroweak gauge boson. These measurements should provide first observations of some of these processes with ATLAS, and will in any case probe for possible higher-than-Standard Model production rates, constraining beyond-the-Standard Model effects. Furthermore more detailed studies of the Z+photon final-state will be made, compared to those done previously. In addition, studies are being made of the performance of the second round ("Phase-II") trigger upgrade of ATLAS, specifically with regard to electron and photon triggering at the very first level ("Level-0") - detailed implementation of improved algorithms for these triggers must be established in the coming years, and the project will deliver this.It is further anticipated that the project will include some operational responsibility for the trigger system when LHC data-taking restarts in 2021.The project analyses experimental data from the 2015-2018 data-taking run of the CERN Large Hadron Collider (LHC), and will also include a first look at the next data, which is expected to arrive from 2021 - especially if the LHC collision energy is increased then.The bulk of all the work described will be done by the student, with appropriate supervision, and in close collaboration with colleagues in Birmingham, and from other institutes which are members of the ATLAS Collaboration.

这个学生项目研究用ATLAS探测器收集的质子-质子碰撞数据中双电弱规范玻色子(W，Z，光子)的产生。这项工作建立在使用2015-2018年收集的ATLAS数据对Z+光子产生的先前测量的基础上，并将研究Z+光子的产生过程，其中Z+光子是通过从入射质子的成分发射的弱电玻色子(“矢量玻色子散射”)碰撞而产生的，以及三个矢量玻色子的产生，包括Z、光子和另一个弱电弱规范玻色子。这些测量应该提供使用ATLAS对其中一些过程的首次观察，并在任何情况下都将探索可能高于标准模型生产率的情况，限制超出标准模型的影响。此外，与以前所做的相比，将对Z+光子末态进行更详细的研究。此外，正在对ATLAS的第二轮(“第二阶段”)触发升级的性能进行研究，特别是关于第一级(“0级”)的电子和光子触发--这些触发的改进算法的详细实施必须在未来几年建立，该项目将实现这一点。进一步预计，该项目将包括在2021年大型强子对撞机(LHC)重新开始数据采集时触发系统的一些操作责任。该项目分析了2015-2018年CERN大型强子对撞机(LHC)数据采集运行的实验数据，还将包括对下一批数据的初步了解，预计将从2021年开始--特别是如果届时大型强子对撞机的碰撞能量增加的话。所描述的大部分工作将由学生在适当的监督下完成，并与伯明翰的同事以及来自ATLAS合作伙伴的其他研究所密切合作。