Higgs Bosons, Heavy Quarks and Soft Gluons: Resummation-Improved Predictions for Associated Higgs Production Processes at the LHC

希格斯玻色子、重夸克和软胶子：大型强子对撞机相关希格斯生产过程的恢复改进预测

• 批准号: 260633026
• 负责人: Professorin Dr. Anna Kulesza
• 金额: --
• 依托单位: Brookhaven National Laboratory
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/260633026?language=en
• 关键词: Higgs; Bosons; Heavy; Quarks; Soft

The 2012 discovery of a Higgs particle at the LHC was a groundbreaking achievement in the history of particle physics. The current imperative of the LHC research programme is the determination of the properties of this new particle, in a quest to establish how closely it resembles the Higgs boson of the Standard Model (SM) of particle physics. Apart from tour de force experimental measurements, the determination of Higgs properties requires knowing corresponding theoretical predictions with high precision. One of the most highly anticipated measurements is the measurement of the coupling of the Higgs particle to top quarks. This coupling can be measured directly in the process of Higgs production in association with a top-antitop quark pair. Production processes involving the coupling of a Higgs boson to heavy quarks play also a very important role in the supersymmetric extensions of the SM of particle physics. Searches for signals of physics beyond the Standard Model and in particular for particles predicted by supersymmetric models constitutes another major research activity at the LHC for the years to come. The main goal of this project is the improvement of the accuracy of the predictions for the production of the SM Higgs boson as well as supersymmetric Higgs bosons in association with heavy quarks at the LHC. Specifically, the improvement will be achieved by calculating the effect of higher-order corrections in perturbative Quantum Chromodynamics due to the emission of soft and collinear gluons. These corrections will be treated systematically to all orders with the help of resummation techniques. The first few objectives formulated within this project relate to the associated production of the SM Higgs boson with top quarks. They focus on calculations necessary to achieve the next-to-leading-logarithmic accuracy of resummed predictions for the total cross section as well as various differential distributions. The calculations proposed in this part of the project will be the first application of analytical resummation to the associated Higgs production with top quarks in hadronic collisions. Investigating the impact of resummed soft gluon corrections on the predictions for the production of Higgs bosons of the Minimal Supersymmetric Standard Model is the subject of another set of objectives in this project. Also in this case, theoretical results will be provided for the total cross sections as well as differential distributions. Apart from analytical calculations, numerical simulations will be performed and public codes will be delivered for all processes considered in this project.

2012年在LHC上发现希格斯粒子是粒子物理史上的开创性成就。 LHC研究计划的当前必要性是确定该新粒子的性质，以确定其与粒子物理标准模型（SM）的Higgs玻色子相似的程度。除了巡回赛的实验测量值之外，希格斯特性的确定还需要高精度了解相应的理论预测。最期待的测量之一是测量希格斯粒子与顶部夸克的耦合。该耦合可以直接在与顶级夸克对相关的希格斯生产过程中进行测量。涉及希格斯玻色子与重夸克的耦合的生产过程在粒子物理SM的超对称扩展中起着非常重要的作用。搜索超出标准模型的物理信号，尤其是超对称模型预测的颗粒，这是LHC在未来几年中的另一个主要研究活动。该项目的主要目的是提高SM Higgs玻色子生产预测的准确性，以及与LHC重型夸克相关的超对称性希格斯玻色子。具体而言，通过计算由于软胶的发射，将通过计算高阶校正在扰动量子染色体动力学中的影响来实现改进。这些校正将在重新召集技术的帮助下系统地处理所有订单。该项目中提出的前几个目标与顶级夸克的SM Higgs玻色子的相关生产有关。他们专注于获得总横截面和各种差分分布的重新定义预测的临时计算精度。项目的这一部分中提出的计算将是将分析重新召集到与HADRONIC碰撞中的顶级夸克的分析重新调整。研究重新亮起的软gluon校正对最小超对称标准模型的希格斯玻色子的预测的影响是该项目中另一组目标的主题。同样在这种情况下，将为总横截面以及差分分布提供理论结果。除了分析计算外，还将进行数值模拟，并将为该项目中考虑的所有过程提供公共代码。