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arXiv 1206.6311hep-ph
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在LHC上从重Gluino探测NLSP顶夸克

Probing NLSP Top Squark from Heavy Gluino at the LHC

Tong Li

摘要:

在这项工作中,我们探讨了7 TeV的LHC轻顶夸克(停止)的含义和调查发现限制在8和14 TeV的LHC使用相同的符号双轻子签名。我们考虑一个简化的谱,其中胶子对的产生伴随着重胶子对衰变到壳层上终止和顶夸克对。然后假设光阑唯一地衰减为c \tilde χ_1^0、bW^+ \tilde χ_1^0或t \tilde χ_1^0。在7 TeV的LHC上进行的同号双轻子搜索,在这种情况下,胶子质量的下限约为800 GeV。我们发现在8 TeV、30 fb^{-1}光度的LHC中,c \tilde χ_1^0、bW^+ \tilde χ_1^0和t \tilde χ_1^0的终止衰变产物分别可以达到960(900)GeV、1.2(1.0)TeV和1.3(1.1)TeV的胶子质量,对应于3(5)σ显著性。在14 TeV、100 fb^{-1}光度的LHC上,发现重胶子质量的极限分别为1.45(1.35)TeV、1.6(1.55)TeV和1.9(1.68)TeV。

英文摘要:

In this work we explore the 7 TeV LHC implication on light top squark (stop) and investigate discovery limits at both 8 and 14 TeV LHC using same-sign dilepton signature. We consider a simplified spectrum with gluino pair production followed by heavy gluino decay into on-shell stop and top quark in pair. The light stop is then assumed to uniquely decay into c\tildeχ_1^0, bW^+\tildeχ_1^0 or t\tildeχ_1^0. The same-sign dilepton search at 7 TeV LHC places a lower bound of about 800 GeV on the gluino mass in this scenario. We find that the 8 TeV LHC with 30 fb^{-1} luminosity can reach 960 (900) GeV, 1.2 (1.0) TeV and 1.3 (1.1) TeV of gluino mass for stop decay product of c\tildeχ_1^0, bW^+\tildeχ_1^0 and t\tildeχ_1^0 respectively, corresponding to 3 (5) σsignificance. The discovery limits of heavy gluino mass at the 14 TeV LHC with 100 fb^{-1} luminosity are 1.45 (1.35) TeV, 1.6 (1.55) TeV and 1.9 (1.68) TeV.

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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