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arXiv 1202.6396hep-ex
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sqrt(s)= 7 TeV pp碰撞中微观黑洞的搜寻

Search for microscopic black holes in pp collisions at sqrt(s) = 7 TeV

CMS Collaboration

摘要:

本文提出了在质心能量为7 TeV的pp碰撞中寻找微观黑洞的方法。该数据样本对应于2011年LHC CMS实验记录的4.7个逆飞秒的积分亮度。具有大的总横向能量的事件已经分析了多个高能喷流,轻子和光子的存在,这是蒸发半经典和量子黑洞和弦球的典型信号。协议与预期的标准模型的背景,这是占主导地位的QCD多喷流生产,已观察到各种组合的多重性的喷流和其他重建对象的最终状态。模型独立的限制设置在新的物理过程产生高多重性,充满活力的最终状态。此外,新的模型特定的指示性限制被设置为不包括质量低于3.8至5.3 TeV的半经典和量子黑洞和质量低于4.6至4.8 TeV的弦球。与以前的搜索相比,该分析的灵敏度大大提高。

英文摘要:

A search for microscopic black holes in pp collisions at a center-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 4.7 inverse femtobarns recorded by the CMS experiment at the LHC in 2011. Events with large total transverse energy have been analyzed for the presence of multiple energetic jets, leptons, and photons, which are typical signals of evaporating semiclassical and quantum black holes, and string balls. Agreement with the expected standard model backgrounds, which are dominated by QCD multijet production, has been observed for various combined multiplicities of jets and other reconstructed objects in the final state. Model-independent limits are set on new physics processes producing high-multiplicity, energetic final states. In addition, new model-specific indicative limits are set excluding semiclassical and quantum black holes with masses below 3.8 to 5.3 TeV and string balls with masses below 4.6 to 4.8 TeV. The analysis has a substantially increased sensitivity compared to previous searches.

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