Search for pair production of massive particles decaying into three quarks with the ATLAS detector in $ \sqrt{s}=7\;\mathrm{TeV} $ pp collisions at the LHC
Search for pair production of massive particles decaying into three quarks with the ATLAS detector in $ \sqrt{s}=7\;\mathrm{TeV} $ pp collisions at the LHC
复制标题
使用 ATLAS 探测器在大型强子对撞机 $ sqrt{s}=7;mathrm{TeV} $ pp 碰撞中搜索衰变为三个夸克的大质量粒子的配对产生
DOI：
10.1007/jhep12(2012)086
复制
发表时间：
2012
影响因子：
5.4
通讯作者：
Aad G
中科院分区：
文献类型：
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作者：
Aad G
利用ATLAS探测器收集的4.6 fb−1的积分光度，在大型强子对撞机上对一种新的大质量彩色粒子在pp碰撞中的强子三体衰变进行了搜索。在违反r宇称的模型中，超对称胶子对的产生被用作基准场景。该分析分为两个搜索通道，每个搜索通道分别针对其对高质量和低质量胶子生产的敏感性进行了优化。第一个搜索通道对六个先导射流的横向动量进行了严格的选择，并作为计数实验进行。第二个搜索渠道关注的是低质量的胶子。选择大半径的射流，并使用两个先导射流的不变质量作为信号与背景的区别。结果发现与标准模型的期望一致，并对允许的胶子质量设置了限制。
A search is conducted for hadronic three-body decays of a new massive coloured particle inpp collisions at the LHC using an integrated luminosity of 4.6 fb− 1 collected by the ATLAS detector. Supersymmetric gluino pair production in the context of a model with R-parity violation is used as a benchmark scenario. The analysis is divided into two search channels, each optimised separately for their sensitivity to high-mass and low-mass gluino production. The first search channel uses a stringent selection on the transverse momentum of the six leading jets and is performed as a counting experiment. The second search channel focuses on low-mass gluinos produced with a large boost. Large-radius jets are selected and the invariant mass of each of the two leading jets is used as a discriminant between the signal and the background. The results are found to be consistent with Standard Model expectations and limits are set on the allowed gluino mass.