Search for dijet resonances in events with an isolated charged lepton using $$ \sqrt{s} $$ = 13 TeV proton-proton collision data collected by the ATLAS detector
Search for dijet resonances in events with an isolated charged lepton using $$ \sqrt{s} $$ = 13 TeV proton-proton collision data collected by the ATLAS detector
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DOI：
10.1007/jhep06(2020)151
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发表时间：
2020-02
影响因子：
5.4
通讯作者：
Atlas Collaboration
中科院分区：
文献类型：
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作者：
Atlas Collaboration
在至少有一个孤立带电粒子的事件中，我们使用139 fb−1 s = 13 TeV的质子-质子碰撞数据进行了双喷流共振的搜索，这些数据是由大型强子对撞机的ATLAS探测器记录的。在0.22 < mjj< 6.3 TeV的区域内，从至少有一个孤立电子或μ子的事件构造的双喷流不变质量（mjj）分布中搜索超过标准模型过程的平稳下降背景的过量。基于事件中存在轻子的触发减少了触发喷流的最小横向动量阈值所施加的限制。这种方法允许探测比包容性双喷流搜索更小的双喷流不变质量，目标是各种新物理模型，例如与轻子衰变的W或Z玻色子相关的新状态。从标准模型的背景hypothesisfound. Limits的贡献，从通用高斯信号的宽度范围从确定的探测器分辨率高达15%的共振质量的范围从0.25 TeV到6 TeV的dijet不变的质量。在标准模型之外的几个场景中也设定了限制，例如序贯标准模型，人工色模型，带电希格斯玻色子模型和简化的暗物质模型。
A search for dijet resonances in events with at least one isolated charged lepon is performed using 139 fb−1 of s√ = 13 TeV proton-proton collision data recorded by the ATLAS detector at the LHC. The dijet invariant-mass (mjj) distribution constructed from events with at least one isolated electron or muon is searched in the region 0.22 < mjj< 6.3 TeV for excesses above a smoothly falling background from Standard Model processes. Triggering based on the presence of a lepton in the event reduces limitations imposed by minimum transverse momentum thresholds for triggering on jets. This approach allows smaller dijet invariant masses to be probed than in inclusive dijet searches, targeting a variety of new-physics models, for example ones in which a new state is produced in association with a leptonically decaying W or Z boson. No statistically significant deviation from the Standard Model background hypothesis is found. Limits on contributions from generic Gaussian signals with widths ranging from that determined by the detector resolution up to 15% of the resonance mass are obtained for dijet invariant masses ranging from 0.25 TeV to 6 TeV. Limits are set also in the context of several scenarios beyond the Standard Model, such as the Sequential Standard Model, a technicolor model, a charged Higgs boson model and a simplified Dark Matter model.