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arXiv 1602.04801hep-phhep-ex
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LHC的精确Drell-Yan测量和双光子过剩的意义

Precision Drell-Yan Measurements at the LHC and Implications for the Diphoton Excess

Florian Goertz, Andrey Katz, Minho Son, Alfredo Urbano

摘要:

在大型强子对撞机上对Drell-Yan(DY)截面的精确测量限制了新的物理场景,这些场景涉及带有电弱(EW)电荷的新状态。我们分析这些限制,并将其应用到模型,可以解决在750 GeV的大型强子对撞机双光子过剩。我们面对这些调查结果与LEP电子战精度测试,并表明,DY提供了更强的约束比LEP数据。虽然8 TeV的数据已经可以探测参数空间的某些有趣区域,但LHC 14的结果预计将覆盖相关地形的很大一部分。我们从现有的数据,估计LHC 14达到的界限,并将它们与从LEP和未来的FCC-ee精度测量得到的界限进行比较。

英文摘要:

Precision measurements of the Drell-Yan (DY) cross section at the LHC constrain new physics scenarios that involve new states with electroweak (EW) charges. We analyze these constraints and apply them to models that can address the LHC diphoton excess at 750 GeV. We confront these findings with LEP EW precision tests and show that DY provides stronger constraints than the LEP data. While 8 TeV data can already probe some parts of the interesting region of parameter space, LHC14 results are expected to cover a substantial part of the relevant terrain. We derive the bounds from the existing data, estimate LHC14 reach and compare them to the bounds one gets from LEP and future FCC-ee precision measurements.

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