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arXiv 1902.04374hep-ex
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在$\sqrt{s} =$ 13 TeV pp碰撞中包含2-和3-喷流事件中近背对背喷流拓扑结构的方位角分离

Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in pp collisions at $\sqrt{s} =$ 13 TeV

CMS Collaboration

备注：
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-17-009 (CMS Public Pages)
发表信息：
Eur. Phys. J. C 79 (2019) 773
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摘要：

给出了包含2个和3个喷流事件的具有最大横向动量的两个喷流之间的方位角相关性的测量结果，即$Δϕ_{12}$。该测量考虑了两个领先的射流在横向平面中几乎共线（“背靠背”）的事件，并针对领先的射流横向动量的几个范围进行测量。质子-质子碰撞数据收集的CMS实验在一个中心的质量能量为13 TeV，对应于一个积分亮度为35.9 fb $^{-1}$。在微扰量子色动力学中，使用前导阶和次前导阶精度的矩阵元进行计算，并辅以前导对数部分子簇射和强子化，得到的预测与测量结果基本一致。测量和理论预测之间的差异高达15%，主要在区域177 $^\circ$ $<$ $Δϕ_{12}$ $<$ 180 $^\circ$。两股和三股射流的测量结果没有同时被任何模型描述。

英文摘要：

A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, $Δϕ_{12}$ , is presented. The measurement considers events where the two leading jets are nearly collinear ("back-to-back") in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 35.9 fb$^{-1}$ are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with the measurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region 177$^\circ$ $<$ $Δϕ_{12}$ $<$ 180$^\circ$. The 2- and 3-jet measurements are not simultaneously described by any of models.

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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