Automation of electroweak NLO corrections for physics beyond the Standard Model

超越标准模型的物理电弱非线性光学校正的自动化

• 批准号: 265915222
• 负责人: Professor Dr. Ansgar Denner
• 金额: --
• 依托单位: Lehrstuhl für Theoretische Physik II: Theoretische Elementarteilchenphysik
• 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 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/265915222?language=en
• 关键词: Automation; electroweak; NLO; corrections; physics

With the discovery of the Higgs particle at the LHC the particle content of the Standard Model has been established. On the other hand, no convincing evidence for physics beyond the SM has emerged so far.Besides direct searches at the LHC, a key for the discovery of new physics are precision investigations ofstandard processes. On the theoretical side these require accurate predictions including higher-order perturbative corrections of the strong and electroweak interaction. As these are needed for many different processes and in various theories, automated tools are highly desirable. Such tools exist for the calculation of corrections of the strong interaction but not yet for the electroweak interaction.The central goal of this project is the development of a tool for the automated calculation of NLO corrections in general relativistic quantum field theories such as the Standard Model or extensions thereof. The input should consist of the underlying theory, in form of a set of Feynman rules or equivalently the corresponding Lagrangian, and the external particles of a given scattering or decay process. The output shall consist of the corresponding leading-order (tree-level) and next-to-leading-order (one-loop) amplitudes, which can be directly used for the calculation of physical predictions in Monte Carlo programs. The tool shall automatically include all relevant contributions, such as loop diagrams, counter terms and rational terms. Moreover it shall allow to calculate corrections in the leading-pole approximation, where only the leading terms in an expansion about intermediate resonances are taken into account. Thus, precise predictions can be obtained also for complicated processes for which complete calculations are presently not feasible.

随着希格斯粒子在LHC的发现，标准模型的粒子内容已经建立。 另一方面，到目前为止还没有令人信服的证据表明存在着超越SM的物理学。除了直接在LHC上进行研究之外，发现新物理学的关键是对标准过程的精确研究。在理论方面，这些需要准确的预测，包括高阶微扰校正的强和电弱相互作用。由于许多不同的过程和各种理论都需要这些工具，因此非常需要自动化工具。这类工具可用于计算强相互作用的修正，但还不适用于电弱相互作用。本项目的中心目标是开发一种工具，用于自动计算广义相对论量子场论（如标准模型或其扩展）中的非线性光学修正。输入应该包括基础理论，以一组费曼规则或等效的相应拉格朗日量的形式，以及给定散射或衰变过程的外部粒子。输出应包括相应的首阶（树级）和次首阶（单圈）振幅，可直接用于蒙特卡罗程序中物理预测的计算。该工具应自动包括所有相关的贡献，如循环图，计数器项和合理的条款。此外，它应允许计算在领先的极点近似，其中只有在中间共振的扩展中的领先项被考虑在内的校正。因此，对于目前无法进行完整计算的复杂过程，也可以获得精确的预测。

项目成果

Anomalous triple-gauge-boson interactions in vector-boson pair production with Recola2

• DOI: 10.1140/epjc/s10052-018-5949-z
• 发表时间: 2018-04
• 期刊: The European Physical Journal C
• 作者: M. Chiesa;A. Denner;J. Lang

Recola2: a one-loop matrix-element generator for BSM theories and SM effective field theory

Recola2：BSM 理论和 SM 有效场理论的单循环矩阵元生成器

• DOI: 10.22323/1.290.0019
• 发表时间: 2017
• 作者: A. Denner;J. N. Lang;S. Uccirati
• 通讯作者: S. Uccirati

Effects of anomalous triple-gauge-boson interactions in diboson production with RECOLA2

RECOLA2 产生二玻色子时异常三规范玻色子相互作用的影响

• DOI: 10.22323/1.303.0012
• 发表时间: 2018
• 期刊: Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)
• 作者: M. Chiesa;A. Denner;J. N. Lang
• 通讯作者: J. N. Lang

Renormalization of mixing angles

• DOI: 10.1007/jhep11(2018)104
• 发表时间: 2018-08
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: A. Denner;S. Dittmaier;J. Lang

Anomalous triple-gauge-boson interactions in diboson production

二玻色子产生中的异常三规范玻色子相互作用

• DOI: 10.22323/1.321.0289
• 发表时间: 2018
• 期刊: Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)
• 作者: M. Chiesa;A. Denner;J. N. Lang
• 通讯作者: J. N. Lang