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arXiv 1708.05720hep-ph
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纯$\overline{\text{DR}}$背景下三圈水平MSSM中Higgs质量的预测

Higgs mass prediction in the MSSM at three-loop level in a pure $\overline{\text{DR}}$ context

Robert V. Harlander, Jonas Klappert, Alexander Voigt

摘要:

在纯$\overline{\text{DR}}$背景下研究了$α_tα_s^2$阶三圈效应对MSSM中轻CP偶希格斯玻色子质量的影响.为此,我们将Kant等人的结果实现到C++模块Himalaya中,并将其链接到Mathematica和C++软件包MatchableSUSY,以创建BSM模型的频谱生成器。的三个循环的结果进行比较,固定顺序的两个循环计算的原始的超对称性和FeynHiggs,以及基于EFT方法的结果。除了预期的减少重整化尺度的依赖性相对于较低的顺序的结果,我们发现,三个循环的贡献显着减少的差异,从EFT预测的超对称尺度$M_S$的TeV区域。Himalaya也可以链接到其他双环$\overline{\text{DR}}$代码,从而允许将这些代码提升到三环级别。

英文摘要:

The impact of the three-loop effects of order $α_tα_s^2$ on the mass of the light CP-even Higgs boson in the MSSM is studied in a pure $\overline{\text{DR}}$ context. For this purpose, we implement the results of Kant et al. into the C++ module Himalaya and link it to FlexibleSUSY, a Mathematica and C++ package to create spectrum generators for BSM models. The three-loop result is compared to the fixed-order two-loop calculations of the original FlexibleSUSY and of FeynHiggs, as well as to the result based on an EFT approach. Aside from the expected reduction of the renormalization scale dependence with respect to the lower order results, we find that the three-loop contributions significantly reduce the difference from the EFT prediction in the TeV-region of the SUSY scale $M_S$. Himalaya can be linked also to other two-loop $\overline{\text{DR}}$ codes, thus allowing for the elevation of these codes to the three-loop level.

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