Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in p p collisions at s = 8 TeV
Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in p p collisions at s = 8 TeV
复制标题
使用 ATLAS 探测器在 s = 8 TeV 的 p p 碰撞中搜索衰变为许多射流的大量超对称粒子
DOI：
10.1103/physrevd.91.112016
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发表时间：
2015
影响因子：
5
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
结果的搜索大质量粒子衰变到完全强子末态。这项研究使用了ATLAS探测器在大型强子对撞机上收集的质子-质子碰撞数据。基于高喷流多重性的签名，而不需要失踪的横向动量被用来寻找宇称违反超对称胶子对生产与随后的夸克衰变。使用的喷气机的数量上的要求，结合单独的要求，标记的喷气机的数量，以及从事件中的大半径喷气机的质量值的标量和形成的拓扑观察进行分析。结果解释的背景下，所有可能的分支比的直接胶子衰变到各种夸克的味道。使用射流计数以及总射流质谱的数据驱动模板估计的预期标准模型背景没有观察到显著偏差。如果中性伴子质量为m × 10=500 GeV，质量为mg <1 TeV的胶子，则胶子对通过中间中性伴子衰变为10个或更多夸克的情况被排除在外。对于轻味终态，mg ~<917 GeV排除了直接胶子衰变为六个夸克的情况，并给出了各种味假设的结果。
Results of a search for decays of massive particles to fully hadronic final states are presented. This search usesof data collected by the ATLAS detector inproton-proton collisions at the LHC. Signatures based on high jet multiplicities without requirements on the missing transverse momentum are used to search for-parity-violating supersymmetric gluino pair production with subsequent decays to quarks. The analysis is performed using a requirement on the number of jets, in combination with separate requirements on the number of-tagged jets, as well as a topological observable formed from the scalar sum of the mass values of large-radius jets in the event. Results are interpreted in the context of all possible branching ratios of direct gluino decays to various quark flavors. No significant deviation is observed from the expected Standard Model backgrounds estimated using jet counting as well as data-driven templates of the total-jet-mass spectra. Gluino pair decays to ten or more quarks via intermediate neutralinos are excluded for a gluino with mass mg˜<1 TeV for a neutralino mass mχ˜10=500 GeV. Direct gluino decays to six quarks are excluded for mg˜<917 GeV for light-flavor final states, and results for various flavor hypotheses are presented.