Measurements of $$W^{+}W^{-}$$ production in decay topologies inspired by searches for electroweak supersymmetry
Measurements of $$W^{+}W^{-}$$ production in decay topologies inspired by searches for electroweak supersymmetry
复制标题
受电弱超对称性搜索启发，对衰变拓扑中 $$W^{ }W^{-}$$ 产生的测量
DOI：
10.1140/epjc/s10052-023-11508-9
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Aad G
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文献类型：
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作者：
Aad G
本文通过大型强子对撞机上的 ATLAS 实验，使用对应于 139 fb - 1 积分光度的数据集，对 s=13 TeV 质子-质子碰撞中 W+W- 产生的基准截面和微分截面进行了测量。研究了仅具有一个电子、一个μ子且没有强子射流的事件。进行测量的基准区域的灵感来自于对超对称电荷衰变到二轻子最终状态的电弱产生的探索。所选事件具有中等缺失横向动量和“横向质量”变量 mT2 的值，该变量广泛用于搜索大型强子对撞机的超对称性。选择这些变量的范围，以便增强直接 W+W- 产生的接受度，并抑制通过顶夸克（被视为背景）产生的接受度。测量六个变量的基准横截面和粒子级微分横截面，并将其与微扰 QCD 计算的两个理论 SM 预测进行比较。
This paper presents a measurement of fiducial and differential cross-sections for W+W- production in proton–proton collisions at s=13 TeV with the ATLAS experiment at the Large Hadron Collider using a dataset corresponding to an integrated luminosity of 139 fb - 1 . Events with exactly one electron, one muon and no hadronic jets are studied. The fiducial region in which the measurements are performed is inspired by searches for the electroweak production of supersymmetric charginos decaying to two-lepton final states. The selected events have moderate values of missing transverse momentum and the ‘stransverse mass’ variable mT2 , which is widely used in searches for supersymmetry at the LHC. The ranges of these variables are chosen so that the acceptance is enhanced for direct W+W- production and suppressed for production via top quarks, which is treated as a background. The fiducial cross-section and particle-level differential cross-sections for six variables are measured and compared with two theoretical SM predictions from perturbative QCD calculations.