Higher-order corrections for effective field theories

有效场论的高阶修正

• 批准号: 2876651
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2876651
• 关键词: Higher; order; corrections; effective; field

There is currently much effort by phenomenologists and experimentalists alike to constrain new physics contributions using LHC data within the SMEFT framework. Higgs physics is central to this programme, also at future colliders. A dedicated treatment requires, first and foremost, a precise modelling of the SM contributions to benchmark Higgs decay and pro-duction modes. Furthermore, including NLO EW and QCD corrections from dimension-6 SMEFT operators is extremely beneficial, both in order to give a realistic view of the number of operators contributing to a given process, and also to stabilise the dependence on unphysical renormalisation scales. While in recent years the calculation of NLO QCD corrections within SMEFT has developed considerably, EW corrections are still in their infancy, limited to a handful of simple processes at parton level and thus not immediately available for serious analyses of experimental data. This project willdevelop a comprehensive tool for modelling Higgs decays within SMEFT, including both EW and QCD corrections originating in the SM and SMEFT to production and decay in phenomenologically relevant channels.interface this tool to the NNLO accurate description of Higgs boson production in the SHERPA event generator. In addition, this allows its parton level out-put to be subjected to the parton showers and hadronisation modules of the SHERPA framework, allowing for a realistic and experimentally usable description of the fully exclusive final state.

当前，现象学家和实验家都在努力使用SMEFT框架内使用LHC数据来限制新物理学的贡献。 Higgs物理学对该计划的核心也是未来的围栏。首先，专门的治疗需要SM对基准Higgs衰减和亲探测模式的贡献的精确建模。此外，包括dimension-6 SMEFT运算符的NLO EW和QCD校正非常有益，这既可以对构成给定过程的操作员的数量进行现实看法，并稳定对非物理肾脏肾脏化量表的依赖。尽管近年来，SMEFT内NLO QCD校正的计算已经大大发展，但EW校正仍处于起步阶段，仅限于Parton级别的少数简单过程，因此无法立即进行实验数据的认真分析。该项目将为SMEFT内的HIGGS衰变建模，包括源自SM和SMEFT的EW和QCD校正，并以现象学相关的频道进行生产和衰减。此外，这使得其Parton级别的效果可以受到Sherpa框架的Parton阵雨和强调模块的约束，从而可以对完全独家的最终状态进行现实且实验上可用的描述。