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arXiv 1407.0600hep-ex
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用ATLAS探测器在$\sqrt{s} =$ 8 TeV质子-质子碰撞中寻找具有丢失横向动量和至少三个b-喷流的末态超对称粒子的强产生

Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets at $\sqrt{s} =$ 8 TeV proton-proton collisions with the ATLAS detector

ATLAS Collaboration

摘要:

本文报道了在大型强子对撞机上用ATLAS探测器在质心能量为8 TeV的质子-质子碰撞20.1 fb $^{-1}$中寻找强超对称粒子产生的结果。搜索是单独进行的事件,无论是零或至少有一个高$p_\mathrm{T}$轻子(电子或μ子),大失踪的横向动量,高喷流多重性和至少三个喷流确定为起源于一个b夸克的碎裂。相对于标准模型的预测,没有观察到过量。结果解释的几个超对称模型的背景下,涉及胶子和标量顶夸克和底夸克,以及mSUGRA/CMSSM模型。根据模型,高达1340 GeV的Gluino质量被排除在外,显着扩展了以前的ATLAS限制。

英文摘要:

This paper reports the results of a search for strong production of supersymmetric particles in 20.1 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of 8 TeV using the ATLAS detector at the LHC. The search is performed separately in events with either zero or at least one high $p_\mathrm{T}$ lepton (electron or muon), large missing transverse momentum, high jet multiplicity and at least three jets identified as originated from the fragmentation of a b-quark. No excess is observed with respect to the Standard Model predictions. The results are interpreted in the context of several supersymmetric models involving gluinos and scalar top and bottom quarks, as well as a mSUGRA/CMSSM model. Gluino masses up to 1340 GeV are excluded, depending on the model, significantly extending the previous ATLAS limits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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