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arXiv 2012.03839hep-phhep-exhep-th
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利用精确可观测量对标准模型扩展进行有效分类

Classifying Standard Model Extensions Effectively with Precision Observables

Supratim Das Bakshi, Joydeep Chakrabortty, Michael Spannowsky

备注：
19 pages, 9 figures
发表信息：
Phys. Rev. D 103, 056019 (2021)
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摘要：

有效的理论是建立良好的理论框架，以描述能量广泛分离的UV模型在较低的能量尺度上对观测量的影响。由于考虑所有标准模型对称性和自由度时有效理论的复杂性，以完全不可知的方式对整个系统进行拉伸以对抗实验测量，导致对有效算子的威尔逊系数的约束，其要么承载很少的信息，要么挑战强加在有效场论框架上的固有假设。一般来说，标准模型的一个特定的高尺度扩展只导出所有可能算子的子集。因此，通过调查哪些运营商引起的不同类别的标准模型扩展和比较，他们的贡献，精度可观的，我们表明，这是可能的，以获得更好的理解，紫外线模型是实现在自然界中。我们考虑了15个UV模型，它们是标准模型的单标量场扩展，并在积分出重标量到1-圈水平后计算了它们的6维算子。只有极少数的这些情景仍然无法区分，而大多数模型可以从现象学上彼此分离。这些方案中的大多数都有自己的特征操作员签名。按照这里概述的方法，对各种模型的比较分析将允许评估在什么水平上可以截断有效场论系列以及优先考虑哪些实验测量。

英文摘要：

Effective theories are well established theoretical frameworks to describe the effect of energetically widely separated UV models on observables at lower energy scales. Due to the complexity of the effective theory when taking all the Standard Model symmetries and degrees of freedoms into account, tensioning the entire system in a completely agnostic way against experimental measurements results in constraints on the Wilson Coefficients of the effective operators that either bears little information or challenge intrinsic assumptions imposed on the effective field theory framework. In general, a specific high-scale extension of the Standard Model only induces a subset of all possible operators. Thus, by investigating which operators are induced by different classes of the Standard Model extensions and comparing to which precision observables they contribute, we show that it is possible to obtain an improved understanding of which UV model is realised in nature. We consider 15 UV models which are single scalar field extensions of the Standard Model and compute their dimension-6 operators after integrating out the heavy scalars up to 1-loop level. Only very few of these scenarios remain indistinguishable, while most of the models can be phenomenologically separated from one another. Most of these scenarios possess their own characteristic operator signature. Following the approach outlined here, a comparative analysis of a wide range of models will allow to assess at what level the effective field theory series can be truncated and which experimental measurements to prioritise.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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