Automatised matching between two scalar sectors at the one-loop level

Automatised matching between two scalar sectors at the one-loop level
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单环级别两个标量扇区之间的自动匹配

DOI:
10.1140/epjc/s10052-019-6570-5
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发表时间:
2019
期刊:
The European Physical Journal C
影响因子:
--
通讯作者:
F. Staub
F. Staub
中科院分区:
--
文献类型:
--
作者:
M. Gabelmann;M. Mühlleitner;F. Staub

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如今,我们需要认真考虑新物理尺度与电弱尺度之间存在巨大差距的可能性。尽管如此,在这种情况下仍然存在可观察到的东西,特别是希格斯质量,它对紫外线理论的属性很敏感。为了对涉及很大自由度的模型获得可靠的预测,必须与有效的理论进行精确匹配。虽然到目前为止仅针对几个选定的示例进行了研究,但我们提出了 Mathematica 软件包 SARAH 的扩展,可以在通用模型的完整单循环级别自动执行两个标量扇区之间的匹配。我们证明,我们可以重现常见研究模型(如分裂或高尺度超对称)的所有重要结果。现在,人们可以轻松地超越这一点,研究涉及非常重态的新想法,其中有效模型可以只是标准模型,也可以是标准模型的扩展。还可以轻松考虑具有多个匹配尺度的场景。我们为 MSSM 提供了模型文件,具有七个不同的质量层次结构以及 NMSSM 的两个高规模版本。此外,还解释了如何实施新模型。
Nowadays, one needs to consider seriously the possibility that a large separation between the scale of new physics and the electroweak scale exists. Nevertheless, there are still observables in this scenario, in particular the Higgs mass, which are sensitive to the properties of the UV theory. In order to obtain reliable predictions for a model which involves very heavy degrees of freedom, the precise matching to an effective theory is necessary. While this has been so far only studied for a few selected examples, we present an extension of theMathematicapackageSARAHto perform automatically the matching between two scalar sectors at the full one-loop level for general models. We show that we can reproduce all important results for commonly studied models like split- or high-scale supersymmetry. One can now easily go beyond that and study new ideas involving very heavy states, where the effective model can either be just the standard model or an extension of it. Also scenarios with several matching scales can be easily considered. We provide model files for the MSSM with seven different mass hierarchies as well as two high-scale versions of the NMSSM. Moreover, it is explained how new models are implemented.
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