Search for new phenomena in events with three charged leptons at s = 7 TeV with the ATLAS detector
Search for new phenomena in events with three charged leptons at s = 7 TeV with the ATLAS detector
复制标题
使用 ATLAS 探测器在 s = 7 TeV 的三个带电轻子事件中寻找新现象
DOI：
10.1103/physrevd.87.052002
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发表时间：
2013
影响因子：
5
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
给出了至少具有三个带电轻子的事件的反常产生的一般搜索。这次搜索使用的是与欧洲核子研究中心大型强子对撞机的ATLAS探测器2011年收集的积分光度相对应的质心能量的碰撞数据样本。事件需要包含至少两个电子或介子，而第三个轻子可能是一个额外的电子或介子，或者是一个强子衰变的牛轻子。根据是否存在衰变为轻子的重建的轻子或玻色子候选者，对事件进行分类。没有观察到明显高于标准模型过程预期的背景。结果是产生至少三个瞬时孤立轻子的非标准模型过程的事件产额的上限，作为几个运动学变量的下界的函数给出。还提供了模型试验的基准效率。通过对双电荷希格斯玻色子的产生设定上限，使其衰变为同号轻子对，说明了该结果的用途。
A generic search for anomalous production of events with at least three charged leptons is presented. The search uses a-collision data sample at a center-of-mass energy ofcorresponding toof integrated luminosity collected in 2011 by the ATLAS detector at the CERN Large Hadron Collider. Events are required to contain at least two electrons or muons, while the third lepton may either be an additional electron or muon, or a hadronically decaying tau lepton. Events are categorized by the presence or absence of a reconstructed tau-lepton or-boson candidate decaying to leptons. No significant excess above backgrounds expected from Standard Model processes is observed. Results are presented as upper limits on event yields from non-Standard-Model processes producing at least three prompt, isolated leptons, given as functions of lower bounds on several kinematic variables. Fiducial efficiencies for model testing are also provided. The use of the results is illustrated by setting upper limits on the production of doubly charged Higgs bosons decaying to same-sign lepton pairs.