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arXiv 0910.4062hep-ex
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在质心能量为$\sqrt{s}$ =10 \TeV的情况下使用$Zγ+ \not E_T$终态在ATLAS中发现GMSB超对称性的可能性

Discovery Potential for GMSB Supersymmetry in ATLAS using the $Zγ+ \not E_T$ Final State at a center of mass energy of $\sqrt{s}$=10 \TeV

Devin Harper

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6 pages, 3 figures, 5 tables; To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726
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摘要：

在类Higgsino中性伴子为NLSP的GMSB模型中，研究了ATLAS探测器对$Zγ+\notE_{T}$末态超对称中性伴子信号的灵敏度。本研究考虑$pp \ra \tildeχ^{0}_{1} \tildeχ^{0}_{1} \ra Z(\ra \ell^{+}\ell^{-})γ\tilde{G}\tilde{G}$的反应，其中$\ell = μ/e$，在质心能量为$\sqrt{s}$ =10 \TeV，使用完全模拟的ATLAS蒙特卡罗事件的信号和背景。基于GMSB模型E线的预测，我们预计，对于小于3 fb $^{-1}$的积分光度，ATLAS可以检测到来自类希格斯诺中性伴子的GMSB信号，该中性伴子在$Zγ+\notE_{T}$终态具有5 $σ$的显著性，假设20%的系统不确定性，其质量为134.7 \GeV。

英文摘要：

We have studied the sensitivity of the ATLAS detector for supersymmetric neutralino signals in the $Zγ+\notE_{T}$ final state in a GMSB model in which the Higgsino-like neutralino is NLSP. This study considers the reaction of $pp \ra \tildeχ^{0}_{1} \tildeχ^{0}_{1} \ra Z(\ra \ell^{+}\ell^{-})γ\tilde{G}\tilde{G}$, where $\ell = μ/e$, at a center of mass energy of $\sqrt{s}$=10 \TeV using fully simulated ATLAS Monte Carlo events both for the signal and background. Based on the GMSB Model Line E predictions, we expect that, for an integrated luminosity of less then 3 fb$^{-1}$, ATLAS could detect the GMSB signal from the Higgsino-like neutralino that has a mass of 134.7 \GeV in the $Zγ+\notE_{T}$ final state with a significance of 5$σ$, assuming 20% systematic uncertainty.

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