Yerevan Physics Institute, Yerevan, Armenia.
Phys Rev Lett. 2012 Aug 17;109(7):071803. doi: 10.1103/PhysRevLett.109.071803. Epub 2012 Aug 16.
A search for new physics is performed in events with two same-sign isolated leptons, hadronic jets, and missing transverse energy in the final state. The analysis is based on a data sample corresponding to an integrated luminosity of 4.98 fb(-1) produced in pp collisions at a center-of-mass energy of 7 TeV collected by the CMS experiment at the LHC. This constitutes a factor of 140 increase in integrated luminosity over previously published results. The observed yields agree with the standard model predictions and thus no evidence for new physics is found. The observations are used to set upper limits on possible new physics contributions and to constrain supersymmetric models. To facilitate the interpretation of the data in a broader range of new physics scenarios, information on the event selection, detector response, and efficiencies is provided.
采用质心能量为 7 TeV 的 pp 对撞数据，在 CMS 实验中对末态包含两个同型孤立轻子、强子喷注和横动量缺失的事例进行了寻找新物理的研究。本分析所使用的数据样本包含 4.98 fb-1 的积分亮度，这是之前发表结果的 140 倍。观测到的事例符合标准模型的预言，因此没有发现新物理的证据。这些观测结果被用来对可能的新物理贡献设定上限，并对超对称模型进行限制。为了便于在更广泛的新物理模型中解释数据，提供了事例选择、探测器响应和效率等方面的信息。
