Differential cross-section measurements for the electroweak production of dijets in association with a Z boson in proton-proton collisions at ATLAS
Differential cross-section measurements for the electroweak production of dijets in association with a Z boson in proton-proton collisions at ATLAS
复制标题
ATLAS 质子-质子碰撞中与 Z 玻色子相关的电弱双射流产生的微分截面测量
DOI：
10.1140/epjc/s10052-020-08734-w
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
本文给出了与aZ玻色子有关的两个喷流的电弱产生的微分截面测量结果。这些测量对矢量玻色子融合产生机制很敏感，并提供了标准模型规范结构的基本测试。利用ATLAS收集的质子-质子碰撞数据进行分析，积分光度为。微分截面是在衰变通道中测量的，它是四个观测量的函数：双喷流不变质量、两个喷流跨越的快度间隔、两个喷流之间的符号方位角和双轻子对的横向动量。数据进行了校正的检测器效率和分辨率的影响，并足够精确，以区分不同的国家的最先进的理论预测计算usingPowheg+ Pythia 8，Herwig 7 +VbfnloandSherpa2.2。微分截面被用来寻找异常的弱玻色子自相互作用，使用六维有效场理论。两个喷流之间的有符号的方位角的测量被发现是特别敏感的标准模型和六维散射振幅之间的干扰，并提供了一个直接的测试电荷共轭和宇称不变性的弱玻色子自相互作用。
Differential cross-section measurements are presented for the electroweak production of two jets in association with aZboson. These measurements are sensitive to the vector-boson fusion production mechanism and provide a fundamental test of the gauge structure of the Standard Model. The analysis is performed using proton–proton collision data collected by ATLAS atand with an integrated luminosity of. The differential cross-sections are measured in thedecay channel () as a function of four observables: the dijet invariant mass, the rapidity interval spanned by the two jets, the signed azimuthal angle between the two jets, and the transverse momentum of the dilepton pair. The data are corrected for the effects of detector inefficiency and resolution and are sufficiently precise to distinguish between different state-of-the-art theoretical predictions calculated usingPowheg+Pythia8,Herwig7+VbfnloandSherpa2.2. The differential cross-sections are used to search for anomalous weak-boson self-interactions using a dimension-six effective field theory. The measurement of the signed azimuthal angle between the two jets is found to be particularly sensitive to the interference between the Standard Model and dimension-six scattering amplitudes and provides a direct test of charge-conjugation and parity invariance in the weak-boson self-interactions.