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arXiv 0910.3606hep-ex
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在CDF II上寻找缺少横能的双光子事件中规范介导破缺的超对称性

Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II

The CDF Collaboration

摘要:

我们提出了一个搜索的结果与规范介导的破缺和$\NONE\toγ\Gravitino$在$γγ$ +失踪的横向能量的最终状态的超对称性。在由CDF II探测器记录的$\sqrt{s}$ $=$ 1.96 TeV的$p{\bar p}$碰撞的2.6 $\pm$ 0.2 \invfb中,我们没有观察到候选事件,这与标准模型背景预期的1.4 $\pm$ 0.4事件一致。我们将横截面限制在95% C. L。并将149 \gevc的世界最佳极限置于\none质量为$τ_{\tildeχ_1^0}$ $<<$ 1 ns。我们还排除了$τ_{\tildeχ_1^0}$ $\lesssim$ 2 ns的\none \质量寿命平面中的区域。

英文摘要:

We present the results of a search for supersymmetry with gauge-mediated breaking and $\NONE\toγ\Gravitino$ in the $γγ$+missing transverse energy final state. In 2.6$\pm$0.2 \invfb of $p{\bar p}$ collisions at $\sqrt{s}$$=$1.96 TeV recorded by the CDF II detector we observe no candidate events, consistent with a standard model background expectation of 1.4$\pm$0.4 events. We set limits on the cross section at the 95% C.L. and place the world's best limit of 149\gevc on the \none mass at $τ_{\tildeχ_1^0}$$<<$1 ns. We also exclude regions in the \none\ mass-lifetime plane for $τ_{\tildeχ_1^0}$$\lesssim$2 ns.

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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