Search for Quantum Black Hole Production in High-Invariant-Mass Lepton + Jet Final States Using p p Collisions at s = 8 TeV and the ATLAS Detector
Search for Quantum Black Hole Production in High-Invariant-Mass Lepton + Jet Final States Using p p Collisions at s = 8 TeV and the ATLAS Detector
复制标题
使用 s = 8 TeV 处的 p p 碰撞和 ATLAS 探测器搜索高不变质量轻子射流最终状态中的量子黑洞产生
DOI：
10.1103/physrevlett.112.091804
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发表时间：
2014
影响因子：
8.6
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
这封信提出了使用 ATLAS 探测器在 LHC 的 pp 碰撞中 √s=8 TeV 处收集的 20.3 fb⎻1 数据来搜索量子黑洞的产生。假设量子黑洞衰变成以轻子（电子或μ子）和射流为特征的最终状态。在任一通道中，均未观察到轻子射流不变质量为 3.5 TeV 或以上的事件，与预期背景一致。对在 1 TeV 以上的不变质量搜索区域中产生的量子黑洞的轻子+射流终态的横截面和分支分数的乘积设定了限制。对于阈值质量高于 3.5 TeV 的量子黑洞，该乘积的组合 95% 置信度上限为 0.18 fb。在所考虑的模型中，这一限制将阈值量子黑洞质量限制在 5.3 TeV 以上。
This Letter presents a search for quantum black-hole production using 20.3 fb⎻¹ of data collected with the ATLAS detector in pp collisions at the LHC at √s=8 TeV. The quantum black holes are assumed to decay into a final state characterized by a lepton (electron or muon) and a jet. In either channel, no event with a lepton-jet invariant mass of 3.5 TeV or more is observed, consistent with the expected background. Limits are set on the product of cross sections and branching fractions for the lepton+jet final states of quantum black holes produced in a search region for invariant masses above 1 TeV. The combined 95% confidence level upper limit on this product for quantum black holes with threshold mass above 3.5 TeV is 0.18 fb. This limit constrains the threshold quantum black-hole mass to be above 5.3 TeV in the model considered.