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.

目前，现象学家和实验学家都在努力在SMEFT框架内使用LHC数据来限制新的物理学贡献。希格斯粒子物理学是这一计划的核心，也是未来对撞机的核心。一个专门的治疗需要，首先，一个精确的模型的SM贡献基准希格斯衰变和production模式。此外，包括NLO EW和QCD校正从维度-6 SMEFT运营商是非常有益的，既为了给一个现实的看法运营商的数量有助于一个给定的过程，也稳定的依赖非物理重正化尺度。虽然近年来在SMEFT内的NLO QCD修正的计算已经有了相当大的发展，但EW修正仍处于起步阶段，仅限于部分子水平的少数简单过程，因此不能立即用于对实验数据的认真分析。该项目将开发一个综合工具，用于模拟SMEFT中的Higgs衰变，包括源自SM和SMEFT的EW和QCD修正，以在唯象相关通道中产生和衰变。此外，这使得它的部分子水平输出受到SHERPA框架的部分子簇射和强子化模块的影响，从而允许对完全排他性的最终状态进行现实和实验可用的描述。