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arXiv 1507.02898hep-ex
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sqrt(s)= 8 TeV pp碰撞中光子超对称性的研究

Search for supersymmetry with photons in pp collisions at sqrt(s) = 8 TeV

CMS Collaboration

摘要:

两个搜索物理超越标准模型的事件包含光子。所用的数据样本对应于在欧洲核子研究中心大型强子对撞机的CMS实验中收集的sqrt(s)= 8 TeV的质子-质子碰撞的19.7逆毫微微电子能的积分亮度。这些分析采用不同的包容性搜索策略。一种分析需要至少一个光子、至少两个射流和大量的横向动量不平衡,而另一种分析选择具有至少两个光子和至少一个射流的事件,并使用剃刀变量来搜索信号事件。从标准模型过程预期的背景主要从数据评估。结果被解释在一般规范介导的超对称性的背景下,与次轻的超对称粒子的bino或wino类中性伴子,并在简化的模型方案。在95%置信水平的上限得到的截面作为中间超对称粒子的质量的函数。

英文摘要:

Two searches for physics beyond the standard model in events containing photons are presented. The data sample used corresponds to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV, collected with the CMS experiment at the CERN LHC. The analyses pursue different inclusive search strategies. One analysis requires at least one photon, at least two jets, and a large amount of transverse momentum imbalance, while the other selects events with at least two photons and at least one jet, and uses the razor variables to search for signal events. The background expected from standard model processes is evaluated mainly from data. The results are interpreted in the context of general gauge-mediated supersymmetry, with the next-to-lightest supersymmetric particle either a bino- or wino-like neutralino, and within simplified model scenarios. Upper limits at the 95% confidence level are obtained for cross sections as functions of the masses of the intermediate supersymmetric particles.

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