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arXiv 2205.02597hep-ex
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利用ATLAS探测器在$\sqrt{s} = 13$ TeV的$pp$碰撞中测量$Z$玻色子与高横动量喷注协同产生的截面

Cross-section measurements for the production of a $Z$ boson in association with high-transverse-momentum jets in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

The ATLAS Collaboration

AI总结:

本文利用ATLAS探测器在13 TeV质子-质子碰撞中测量了Z玻色子与高横动量喷注协同产生的截面及角关联,并与NNLOjet、MadGraph5_aMC@NLO和Sherpa等理论预言进行了比较,验证了标准模型预言。

摘要:

本文给出了与高横动量喷注($p_{\mathrm{T}} \geq 100$ GeV)协同产生并衰变为带电轻子对($e^+e^-, \mu^+\mu^-$)的$Z$玻色子的截面测量结果。测量使用LHC上ATLAS实验收集的质子-质子碰撞数据,质心能量为$\sqrt{s}=13$ TeV,对应积分亮度为$139$ fb$^{-1}$。在至少含有一个$p_{\mathrm{T}} \geq 500$ GeV喷注的事例中,测量了$Z$玻色子与最近喷注之间的角关联。特别关注的事例拓扑包括双喷注事例中$Z$玻色子的共线发射,以及$Z$玻色子被加速后反冲离开喷注的情形。将基准截面与最先进的理论预言进行了比较。发现数据与NNLOjet的次次领先阶预言以及次领先阶多腿生成器MadGraph5_aMC@NLO和Sherpa的预言一致。

英文摘要:

Cross-section measurements for a $Z$ boson produced in association with high-transverse-momentum jets ($p_{\mathrm{T}} \geq 100$ GeV) and decaying into a charged-lepton pair ($e^+e^-,μ^+μ^-$) are presented. The measurements are performed using proton-proton collisions at $\sqrt{s}=13$ TeV corresponding to an integrated luminosity of $139$ fb$^{-1}$ collected by the ATLAS experiment at the LHC. Measurements of angular correlations between the $Z$ boson and the closest jet are performed in events with at least one jet with $p_{\mathrm{T}} \geq 500$ GeV. Event topologies of particular interest are the collinear emission of a $Z$ boson in dijet events and a boosted $Z$ boson recoiling against a jet. Fiducial cross sections are compared with state-of-the-art theoretical predictions. The data are found to agree with next-to-next-to-leading-order predictions by NNLOjet and with the next-to-leading-order multi-leg generators MadGraph5_aMC@NLO and Sherpa.

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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