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arXiv 1502.01518hep-ex
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用ATLAS探测器在$\sqrt{s}=8$ TeV上寻找pp碰撞中具有高能喷流和大横向动量丢失的末态新现象

Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

ATLAS Collaboration

摘要:

搜索结果的新现象,在最后的状态与一个充满活力的喷流和大失踪的横向动量的报告。该搜索使用2012年在LHC使用ATLAS探测器收集的$\sqrt{s}=8$ TeV数据的20.3 fb $^{-1}$。事件要求至少有一个喷流具有$p_T > 120$ GeV且没有轻子。九个信号区域被认为是增加丢失的横向动量要求之间的$E_T^{miss} > 150$ GeV和$E_T^{miss} > 700$ GeV。观察到数据中的事件数量与标准模型预期之间具有良好的一致性。结果被翻译成排斥限制模型与大的额外的空间维度,对生产弱相互作用的暗物质候选人,和生产非常轻的引力子在规范介导的超对称模型。此外,限制生产的无形衰减希格斯玻色子导致类似的拓扑结构的最终状态。

英文摘要:

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb$^{-1}$ of $\sqrt{s}=8$ TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with $p_T > 120$ GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between $E_T^{miss} > 150$ GeV and $E_T^{miss} > 700$ GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with large extra spatial dimensions, pair production of weakly interacting dark matter candidates, and production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presented.

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