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arXiv 1109.3089hep-ex
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利用1 fb^-1的ATLAS数据寻找衰变为电子和μ子的重中性粒子

Search for a heavy neutral particle decaying into an electron and a muon using 1 fb^-1 of ATLAS data

ATLAS Collaboration

摘要:

一个搜索的高质量的中性粒子,直接衰变到EMU的最终状态。该数据样本由ATLAS探测器在2011年3月至6月期间在LHC的sqrt(s)= 7 TeV pp碰撞中记录,对应的积分亮度为1.07 fb^-1。发现数据与标准模型背景一致。高emu质量区域被用来设定两个可能的新物理过程产生的95%置信度上限:R宇称破坏超对称模型中的τ中微子和轻子味破坏模型中的类Z '矢量玻色子。

英文摘要:

A search is presented for a high mass neutral particle that decays directly to the emu final state. The data sample was recorded by the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC from March to June 2011 and corresponds to an integrated luminosity of 1.07 fb^-1. The data are found to be consistent with the Standard Model background. The high emu mass region is used to set 95% confidence level upper limits on the production of two possible new physics processes: tau sneutrinos in an R-parity violating supersymmetric model and Z'-like vector bosons in a lepton flavor violating model.

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