Observation of WWW Production in pp Collisions at sqrt[s]=13 TeV with the ATLAS Detector.
Observation of WWW Production in pp Collisions at sqrt[s]=13 TeV with the ATLAS Detector.
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DOI：
10.1103/physrevlett.129.061803
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发表时间：
2022-01
影响因子：
8.6
通讯作者：
G. Aad;B. Abbott;D. Abbott;A. Abed Abud;K. Abeling;D. Abhayasinghe;S. H. Abidi;A. Aboulhorma-A.-Aboul
中科院分区：
文献类型：
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作者：
G. Aad;B. Abbott;D. Abbott;A. Abed Abud;K. Abeling;D. Abhayasinghe;S. H. Abidi;A. Aboulhorma-A.-Aboul
这封信报道了利用大型强子对撞机ATLAS探测器在质心能量为13 TeV时记录的139 fb^{-1}质子-质子碰撞数据对WWW产生的观测和截面测量。选择具有两个同号轻子（电子或μ子）和至少两个喷流的事件，以及具有三个带电轻子的事件。然后使用多变量技术来区分信号和背景事件。观察到来自WWW生产的事件具有8.0标准差的显著性，其中期望值为5.4标准差。包含WWW产生截面的测量值为820±100（stat）±80（syst）fb，与在次领先阶QCD和领先阶电弱精度下计算的预测截面511±18 fb相差约2.6个标准差。
This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb^{-1} of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Events with two same-sign leptons (electrons or muons) and at least two jets, as well as events with three charged leptons, are selected. A multivariate technique is then used to discriminate between signal and background events. Events from WWW production are observed with a significance of 8.0 standard deviations, where the expectation is 5.4 standard deviations. The inclusive WWW production cross section is measured to be 820±100 (stat)±80 (syst) fb, approximately 2.6 standard deviations from the predicted cross section of 511±18 fb calculated at next-to-leading-order QCD and leading-order electroweak accuracy.