Higgs-Physics at a Future Electron Proton Collider

未来电子质子对撞机的希格斯物理学

• 批准号: 418662039
• 负责人: Professor Dr. Matthias Schott
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/418662039?language=en
• 关键词: Higgs; Physics; Future; Electron; Proton

Precision measurements of the Higgs boson, in particular its coupling parameters to fermions and bosons as well as its total width, would allow to test the mechanics of electroweak symmetry breaking and thus open a window to physics beyond the Standard Model. Several future collider projects, which are currently under discussion, aim to provide the experimental facilities for these high precision measurements. The most prominent projects would use electron-positron collisions, such as the International Linear Collider (ILC) or the Circular Electron Positron Collider (CEPC) proposals. In recent years, it became evident that an electron-proton collider with a center-of-mass energy of up to 1.3 TeV at the Large Hadron Collider (LHC) could be a potential low-cost alternative. Carefully conducted studies suggest that a combination of data collected in electron-proton and proton-proton collisions would yield a competitive precision on Higgs coupling parameters. However, as of now it is not clear whether a total Higgs width measurement could be performed as well. Moreover, a full detector simulation is currently not used for full detector- or physics-performance evaluations. Such studies on the Higgs physics potential at a future Large electron Hadron Collider (LHeC) were strongly encouraged during the latest strategy workshop of the German particle physics community. Within this research project, we will further develop the full LHeC detector simulation and consolidate the relevant studies using alternative signal and background samples. Moreover, we plan to investigate the possibility to use the cross-section dependence on the center-of-mass energy of the Higgs boson production in order to measure a model independent total width of the Higgs boson.

对希格斯玻色子的精确测量，特别是它与费米子和玻色子的耦合参数以及它的总宽度，将允许测试电弱对称性破缺的力学，从而打开一扇超越标准模型的物理学窗口。目前正在讨论的几个未来的对撞机项目旨在为这些高精度测量提供实验设施。最突出的项目将使用电子-正电子碰撞，如国际线性对撞机（ILC）或圆形电子正电子对撞机（CEPC）的建议。近年来，大型强子对撞机（LHC）的质心能量高达1.3 TeV的电子质子对撞机可能是一种潜在的低成本替代方案。仔细进行的研究表明，在电子-质子和质子-质子碰撞中收集的数据的组合将产生具有竞争力的希格斯耦合参数精确度。然而，到目前为止，还不清楚是否可以进行总希格斯宽度测量。此外，完整的探测器模拟目前不用于完整的探测器或物理性能评估。在德国粒子物理界最近的战略研讨会上，强烈鼓励在未来的大型电子强子对撞机（LHeC）上对希格斯物理学势进行这种研究。在本研究项目中，我们将进一步开发完整的LHeC探测器模拟，并使用替代信号和背景样本巩固相关研究。此外，我们计划调查的可能性，以使用截面依赖的质量中心的能量的希格斯玻色子生产，以测量一个模型独立的希格斯玻色子的总宽度。