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arXiv 1502.04358hep-ex
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用MT2变量研究8 TeV pp碰撞中产生的强子事件的超对称性

Searches for supersymmetry using the MT2 variable in hadronic events produced in pp collisions at 8 TeV

CMS Collaboration

摘要:

利用在CERN LHC上发生的8 TeV pp碰撞中产生的强子事件进行了超对称性分析(SUSY)。搜索是基于MT 2变量,这是一个事件的横向动量不平衡的措施。用CMS检测器收集数据,并对应于19.5个反毫微微巴恩的积分亮度。进行两次相关搜索。第一个是一个包容性的搜索的基础上定义的MT 2变量,强子能量的事件,射流的多重性,以及确定为源自底夸克的射流的数量的值的信号区域。第二个是寻找对应于希格斯玻色子玻色子衰变为底夸克-反夸克对的质量峰,其中希格斯玻色子玻色子是作为超对称粒子的衰变产物产生的。对于这两种检索,使用数据对照样本评价主要背景。没有显着超过预期的背景事件的数量,观察和排除限制各种超对称模型推导。

英文摘要:

Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the MT2 variable, which is a measure of the transverse momentum imbalance in an event. The data were collected with the CMS detector and correspond to an integrated luminosity of 19.5 inverse femtobarns. Two related searches are performed. The first is an inclusive search based on signal regions defined by the value of the MT2 variable, the hadronic energy in the event, the jet multiplicity, and the number of jets identified as originating from bottom quarks. The second is a search for a mass peak corresponding to a Higgs boson decaying to a bottom quark-antiquark pair, where the Higgs boson is produced as a decay product of a SUSY particle. For both searches, the principal backgrounds are evaluated with data control samples. No significant excess over the expected number of background events is observed, and exclusion limits on various SUSY models are derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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