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arXiv 1905.09752hep-ex
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用ATLAS探测器测量在$\sqrt{s} = 13$ TeV pp碰撞中对包含$Z$ -玻色子产生的潜在事件敏感的分布

Measurement of distributions sensitive to the underlying event in inclusive $Z$-boson production in pp collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ATLAS Collaboration

摘要:

本文介绍了带电粒子分布的测量敏感的事件包含一个$Z$玻色子衰变成μ子对的基础事件的属性。这些数据是使用ATLAS探测器在大型强子对撞机质子-质子碰撞中获得的,质心能量为13 TeV,积分亮度为3.2 fb $^{-1}$。在相对于$Z$玻色子方向定义的方位角区域中测量带电粒子多重性和带电粒子横向动量的分布。测量的分布进行比较,实现不同的基础事件模型的各种蒙特卡罗发电机的预测。蒙特卡洛模型预测定性描述的数据很好,但有一些显着的差异。

英文摘要:

This paper presents measurements of charged-particle distributions sensitive to the properties of the underlying event in events containing a $Z$ boson decaying into a muon pair. The data were obtained using the ATLAS detector at the LHC in proton-proton collisions at a centre-of-mass energy of 13 TeV with an integrated luminosity of 3.2 fb$^{-1}$. Distributions of the charged-particle multiplicity and of the charged-particle transverse momentum are measured in regions of the azimuth defined relative to the $Z$ boson direction. The measured distributions are compared with the predictions of various Monte Carlo generators which implement different underlying-event models. The Monte Carlo model predictions qualitatively describe the data well, but with some significant discrepancies.

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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