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arXiv 1303.1900hep-phhep-ex
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在LHC上约束的MSSM和NMSSM的电弱精度测试

Electroweak Precision Tests On the MSSM and NMSSM Constrained at the LHC

Sibo Zheng, Yao Yu

摘要:

继以前的工作,在超对称性的电弱精密测试,我们继续探索他们的影响MSSM和NMSSM这两个都是严格限制的希格斯质量和衰变实验在LHC。我们采用普适夸克、三代斯莱普顿质量和所有SM费米子的A项。我们确定了随着$\tanβ$和/或$γγ$速率的增加,MSSM和NMSSM在$S$-$T$平面中的流动。无论是增加$R_γ$或$\tanβ$的值,我们发现,在MSSM中的基准点往往会被推到轮廓外99%CL,然而,相反,他们往往会缩小到SM参考点在NMSSM。特别是,由于这种行为,MSSM的EWPT在99% CL时排除了$\tanβ\gtrsim 50$。此行为对于区分NMSSM和MSSM也很有用。一个副产品是来自中性伴子和电荷伴子的贡献在MSSM中比在NMSSM中受到更多的抑制。

英文摘要:

Following previous works regarding electroweak precision tests in supersymmetry, we continue to explore their implications to the MSSM and NMSSM both of which are tightly constrained by the Higgs mass and its decay experiments at the LHC. We adopt universal squark, slepton mass of three generations, and A-term of all SM fermions. We determine the flows of both MSSM and NMSSM in the $S$-$T$ plane with increasing $\tanβ$ and/or $γγ$ rate. Either increasing the value of $R_γ$ or $\tanβ$, we find that the benchmark points tend to be pushed outside the contour at 99% CL in the MSSM, however, conversely they tend to shrink towards to the SM reference point in the NMSSM. In particular, $\tanβ\gtrsim 50$ is excluded at 99% CL by the EWPTs for the MSSM due to this behavior. This behavior is also useful to distinguish the NMSSM from the MSSM. A byproduct is that the contributions coming from the neutralinos and charginos should be more suppressed in the MSSM in comparison with the NMSSM.

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