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arXiv 1604.04080hep-ph
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NLO和对LHC上$Z$ -玻色子轻子衰变产生$ZZ+{\rm jet}$的电弱修正

NLO QCD and electroweak corrections to $ZZ+{\rm jet}$ production with $Z$-boson leptonic decays at LHC

Wang Yong, Zhang Ren-You, Ma Wen-Gan, Li Xiao-Zhou, Guo Lei

摘要:

在本文中,我们提出了完整的非线性光学QCD +非线性光学EW修正的$Z$玻色子对的生产与硬喷注在大型强子对撞机。随后的$Z$ -玻色子轻子衰变采用朴素NWA和MadSpin方法进行比较。由于$ZZ+{\rm jet}$的产生是强子对撞机上单个希格斯玻色子产生和新物理探索的重要背景,因此对$ZZ+{\rm jet}$的强子产生进行高精度的理论预言是必要的。我们给出了积分截面和末态粒子的各种运动学分布的数值结果,并得出结论:考虑$Z$ -玻色子轻子衰变的自旋关联和有限宽度效应是必要的。我们还发现非线性光学EW修正在与LHC实验精度相匹配的定量上是不可忽略的,特别是在高横动量区。

英文摘要:

In this paper we present the full NLO QCD + NLO EW corrections to the $Z$-boson pair production in association with a hard jet at the LHC. The subsequent $Z$-boson leptonic decays are included by adopting both the naive NWA and MadSpin methods for comparison. Since the $ZZ+{\rm jet}$ production is an important background for single Higgs boson production and new physics search at hadron colliders, the theoretical predictions with high accuracy for the hadronic production of $ZZ+{\rm jet}$ are necessary. We present the numerical results of the integrated cross section and various kinematic distributions of final particles, and conclude that it is necessary to take into account the spin correlation and finite width effects from the $Z$-boson leptonic decays. We also find that the NLO EW correction is quantitatively nonnegligible in matching the experimental accuracy at the LHC, particularly is significant in high transverse momentum region.

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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