Constraints on nonuniversal gaugino mass scenario using the latest LHC data
Constraints on nonuniversal gaugino mass scenario using the latest LHC data
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DOI：
10.1103/physrevd.93.055019
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发表时间：
2016-01
影响因子：
5
通讯作者：
Junichiro Kawamura;Y. Omura
中科院分区：
文献类型：
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作者：
Junichiro Kawamura;Y. Omura
根据LHC8和LHC13超粒子搜索的最新结果，我们研究了最小超对称标准模型(MSSM)中非普适伽吉诺质量情景的排除极限。在这种情况下，适当的WINO和GUIINO质量比可以实现希格斯玻色子质量的观测值，同时保持一个小的$\MU$参数。如此小的$\Mu$参数对应于高奇诺的质量，因此最轻的中性诺和Chargino是类似高奇诺的，它们的质量几乎是简并的。此外，我们发现右手的顶夸克往往比其他斯费米子更轻，然后顶夸克的搜索，即顶夸克衰变为夸克和希格西诺，与我们的模型有关。在我们的分析中，利用在$BB+E_T^{\Rm未命中}$和$Tb+E_T^{\Rm未命中}$通道中的顶夸克搜索数据导出了排除极限。此外，对胶子质量的排除极限也进行了研究，这对我们的设想是至关重要的。对胶子现象的分析是基于ATLAS实验中大量丢失能量和至少三个b标记喷流的分析数据。
We investigate exclusion limits on the the non-universal gaugino mass scenario in the Minimal Supersymmetric Standard Model (MSSM), according the the latest results of the super-particle search at the LHC8 and the LHC13. In this scenario, suitable ratios of wino to gluino mass can realize the observed value of the Higgs boson mass, while keeping a small $\mu$ parameter. Such a small $\mu$ parameter corresponds to the mass of higgsino, so that lightest neutralino and chargino are higgsino-like and their masses are almost degenerate. Besides, we find that the right-handed top squark tends to be lighter than other sfermions and then the top squark search, where the top squark decays to a quark and higgsino, is relevant to our model. In our analysis, the exclusion limits are derived using the data of the top squark searches in the $bb + E_T^{\rm miss}$ and $tb + E_T^{\rm miss}$ channels. Furthermore, the exclusion limit on gluino mass, which is crucial to our scenario, is investigated as well. The analysis of the gluino is based on the data of the analysis with large missing energy and at least three b-tagged jets at the ATLAS experiment.