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arXiv 1708.02812hep-ex
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sqrt(s)= 13 TeV质子-质子碰撞中四轻子双喷注事件的矢量玻色子散射测量和反常四次耦合约束

Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at sqrt(s) = 13 TeV

CMS Collaboration

摘要:

本文给出了两个Z玻色子和两个喷注事件的矢量玻色子散射的测量结果和反常四次规范耦合的约束条件。该分析是基于质子-质子碰撞的数据样本,在sqrt(s)= 13 TeV收集的CMS检测器和相应的积分亮度为35.9个反femtobarns。搜索在全轻子末态ZZ至111 'l'中执行,其中l,l' = e,μ。与两个喷流相关联的两个Z玻色子的电弱产生被测量,其观测(预期)显著性为2.7(1.6)标准差。电弱产生的基准截面为σ [EW](pp -> ZZjj -> 111 'l'jj)= 0.40 - 0.16 + 0.21(stat)-0.09 + 0.13(syst)fb,与标准模型的预测一致。反常四次规范耦合的极限由有效场论算符T0、T1、T2、T8和T9确定。这是LHC在ZZ通道中首次测量矢量玻色子散射。

英文摘要:

A measurement of vector boson scattering and constraints on anomalous quartic gauge couplings from events with two Z bosons and two jets are presented. The analysis is based on a data sample of proton-proton collisions at sqrt(s) = 13 TeV collected with the CMS detector and corresponding to an integrated luminosity of 35.9 inverse femtobarns. The search is performed in the fully leptonic final state ZZ to lll'l', where l, l' = e, mu. The electroweak production of two Z bosons in association with two jets is measured with an observed (expected) significance of 2.7 (1.6) standard deviations. A fiducial cross section for the electroweak production is measured to be sigma[EW](pp -> ZZjj -> lll'l'jj) = 0.40 -0.16 +0.21 (stat) -0.09 +0.13 (syst) fb, which is consistent with the standard model prediction. Limits on anomalous quartic gauge couplings are determined in terms of the effective field theory operators T0, T1, T2, T8, and T9. This is the first measurement of vector boson scattering in the ZZ channel at the LHC.

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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