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Effective scanning method of the NMSSM parameter space

机译:NMSSM参数空间的有效扫描方法

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The next-to-minimal supersymmetric standard model (NMSSM) naturally provides a 125?GeV Higgs boson without the need for large loop corrections from multi–tera electron volt stop quarks. Furthermore, the NMSSM provides an electroweak scale dark matter candidate consistent with all experimental data, like relic density and nonobservation of direct dark matter signals with the present experimental sensitivity. However, more free parameters are introduced in the NMSSM, which are strongly correlated. A simple parameter scan without knowing the correlation matrix is not efficient and can miss significant regions of the parameter space. We introduce a new technique to sample the NMSSM parameter space, which takes into account the correlations. For this, we project the seven-dimensional NMSSM parameter space onto the three-dimensional Higgs boson mass parameter space. The reduced dimensionality allows for a nonrandom sampling and therefore a complete coverage of the allowed NMSSM parameters. In addition, the parameter correlations and possible deviations of the signal strengths of the observed 125 Higgs boson from the standard model values are easily predicted.
机译:接近最小的超对称标准模型(NMSSM)自然提供了125?GeV的希格斯玻色子,而无需进行多兆电子伏特夸克的大环路校正。此外,NMSSM提供了与所有实验数据一致的电弱规模暗物质候选物,例如文物密度和不具有当前实验灵敏度的直接暗物质信号观测。但是,在NMSSM中引入了更多的自由参数,这些参数具有很强的相关性。在不知道相关矩阵的情况下进行简单的参数扫描效率不高,并且可能会丢失参数空间的重要区域。我们引入了一种新技术来采样NMSSM参数空间,该技术考虑了相关性。为此,我们将7维NMSSM参数空间投影到3维希格斯玻色子质量参数空间上。降低的维数允许进行非随机采样,因此可以完全覆盖所允许的NMSSM参数。另外,可以容易地预测观察到的125希格斯玻色子与标准模型值的参数相关性和信号强度的可能偏差。

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