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arXiv 1504.01385hep-phhep-ex
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LHC上暗区动力学的新探索

A New Probe of Dark Sector Dynamics at the LHC

Arpit Gupta, Reinard Primulando, Prashant Saraswat

摘要:

我们提出了一个大型强子对撞机搜索双轻子共振与大失踪的能量作为一个通用的探测TeV暗扇区模型。如果暗扇区包含U(1)规范玻色子或Z ',它与标准模型U(1)动力学混合,就可能发生这种共振。对于小混合,由于大的Drell-Yan背景,在标准共振搜索中看不到Z '的直接2比1产生。然而,在涉及其他暗扇区粒子的过程中可能会产生大量的Z '玻色子,导致最终状态具有Z'共振和缺少横向动量。这种过程的例子包括暗扇区内的级联衰变和最终状态暗扇区粒子的Z 'off辐射。即使当在暗扇区过程中产生Z '玻色子的速率被抑制时,该通道也可以提供比诸如单喷射搜索的暗扇区的传统对撞机探测器更好的灵敏度。我们发现,从8 TeV的LHC运行的数据可以解释给这样的过程的界限,更优化的搜索可以扩展的灵敏度,并继续探测这些模型在运行II的数据。

英文摘要:

We propose a LHC search for dilepton resonances in association with large missing energy as a generic probe of TeV dark sector models. Such resonances can occur if the dark sector includes a U(1) gauge boson, or Z', which kinetically mixes with the Standard Model U(1). For small mixing, direct 2 to 1 production of the Z' is not visible in standard resonance searches due to the large Drell-Yan background. However, there may be significant production of the Z' boson in processes involving other dark sector particles, resulting in final states with a Z' resonance and missing transverse momentum. Examples of such processes include cascade decays within the dark sector and radiation of the Z' off of final state dark sector particles. Even when the rate to produce a Z' boson in a dark sector process is suppressed, this channel can provide better sensitivity than traditional collider probes of dark sectors such as monojet searches. We find that data from the 8 TeV LHC run can be interpreted to give bounds on such processes; more optimized searches could extend the sensitivity and continue to probe these models in the Run II data.

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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