Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond
Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond
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DOI：
10.1140/epjc/s10052-017-4893-7
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
F. Staub;W. Porod
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文献类型：
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作者：
F. Staub;W. Porod
长期以来，超对称态质量轻的最小超对称标准模型（MSSM）被认为是粒子物理标准模型最自然的扩展。因此，一个有效的近似是匹配MSSM的精确测量直接在电弱尺度。这种方法也被用于MSSM的所有专用频谱生成器。然而，超对称（SUSY）尺度越高，由这种匹配引入的不确定性越大。我们指出的重要后果的两个规模的匹配，在SM内的运行参数计算和评估的超对称尺度，在那里他们匹配到完整的模型。我们的规范耦合统一以及超对称质量谱的影响。通过在有效SM内进行计算，改进了对大超对称质量的Higgs质量预测。这里介绍的方法现在也可以在频谱发生器Spheno中使用。此外，还对SARAH进行了相应的扩展，使我们有可能在许多不同的超对称模型中研究这些效应。
For a long time, the minimal supersymmetric standard model (MSSM) with light masses for the supersymmetric states was considered as the most natural extension of the Standard Model of particle physics. Consequently, a valid approximation was to match the MSSM to the precision measurement directly at the electroweak scale. This approach was also utilized by all dedicated spectrum generators for the MSSM. However, the higher the supersymmetric (SUSY) scale is, the bigger the uncertainties which are introduced by this matching. We point out important consequences of a two-scale matching, where the running parameters within the SM are calculated atand evaluated up to the SUSY scale, where they are matched to the full model. We show the impact on gauge coupling unification as well as the SUSY mass spectrum. Also the Higgs mass prediction for large supersymmetric masses has been improved by performing the calculation within an effective SM. The approach presented here is now also available in the spectrum generatorSPheno. Moreover, alsoSARAHwas extended accordingly and gives the possibility to study these effects now in many different supersymmetric models.