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arXiv 2009.01249hep-phhep-ex
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Higgs和电弱物理学中有效场论的BSM基准

BSM Benchmarks for Effective Field Theories in Higgs and Electroweak Physics

D. Marzocca, F. Riva, J. Criado, S. Dawson, J. de Blas, B. Henning, D. Liu, C. Murphy, M. Perez-Victoria, J. Santiago, L. Vecchi, Lian-Tao Wang

摘要:

有效场论(EFT)捕获低能量下重动力学的效应,并代表标准模型(SM)精度测试中的一个重要组成部分。本文件收集了一些相关的重物理超出SM的情况下,并提出了明确的威尔逊系数在其低能EFT的表达式。它包括i)弱耦合场景,其中一个或几个不同自旋和量子数的粒子与SM线性相互作用并在树水平上产生EFT效应; ii)重粒子二次相互作用,由此产生的EFT仅在回路水平上产生; iii)强耦合场景,其中Wilson系数的大小由对称性参数控制。这篇评论旨在激励实验EFT研究中,只有一个子集的所有可能的EFT相互作用的使用,以及促进EFT配合的理论解释。

英文摘要:

Effective Field Theories (EFTs) capture effects from heavy dynamics at low energy and represent an essential ingredient in the context of Standard Model (SM) precision tests. This document gathers a number of relevant scenarios for heavy physics beyond the SM and presents explicit expressions for the Wilson coefficients in their low-energy EFT. It includes i) weakly coupled scenarios in which one or a few particles of different spins and quantum numbers interact linearly with the SM and generate EFT effects at tree-level, ii) scenarios where heavy particles interact quadratically whereupon the resulting EFT arises only at loop-level and iii) strongly coupled scenarios where the size of Wilson coefficients is controlled by symmetry arguments. This review aims at motivating experimental EFT studies in which only a subset of all possible EFT interactions is used, as well as facilitating the theoretical interpretation of EFT fits.

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