‘Stop’ that ambulance! New physics at the LHC?
‘Stop’ that ambulance! New physics at the LHC?
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DOI：
10.1007/jhep12(2014)010
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发表时间：
2014-12
影响因子：
5.4
通讯作者：
Jong Soo Kim;K. Rolbiecki;K. Sakurai;J. Tattersall
中科院分区：
文献类型：
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作者：
Jong Soo Kim;K. Rolbiecki;K. Sakurai;J. Tattersall
许多大型强子对撞机的搜索现在显示出有趣的过度现象。最显著的是，在7和8 TeV的运行中，通过ATLAS和CMS测量到的W+ W−截面始终比理论预测高约20%。最近，对包含两个或三个轻子的最终态的超对称搜索也在某些信号区域发现了比预测更多的事件。我们证明了一个包含光阑、winos和binos的超对称模型可以一致地匹配数据。我们对所有可能对我们的模型敏感的测量和搜索进行拟合，并发现与标准模型相比，一旦考虑到拟合中的额外自由度，其对数似然降低了15.4，对应于3.5-σ。
A number of LHC searches now display intriguing excesses. Most prominently, the measurement of the W+ W− cross-section has been consistently∼ 20% higher than the theoretical prediction across both ATLAS and CMS for both 7 and 8 TeV runs. More recently, supersymmetric searches for final states containing two or three leptons have also seen more events than predicted in certain signal regions. We show that a supersymmetric model containing a light stop, winos and binos can consistently match the data. We perform a fit to all measurements and searches that may be sensitive to our model and find a reduction in the log-likelihood of 15.4 compared to the Standard Model which corresponds to 3.5-σ once the extra degrees of freedom in the fit are considered.