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arXiv 1901.04735hep-ex
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ATLAS中$t \overline{t}$产生的差异测量

Differential measurements of $t \overline{t}$ production in ATLAS

Matteo Negrini

摘要:

$t \overline{t}$产物的微分截面已经在大型强子对撞机上用ATLAS实验测量过。蒙特卡罗计算提供了一个整体良好的建模所有测量的分布,除了顶夸克的横向动量,所有的发电机在下一个领先的顺序产生更硬的光谱。这些测量也被包括在PDF拟合中,有助于大$x$下胶子PDF不确定性的合理降低。

英文摘要:

Differential cross sections of $t \overline{t}$ production have been measured by the ATLAS experiment at the LHC. Monte Carlo calculations provide an overall good modeling of all measured distributions, except for the transverse momentum of the top quark, for which all the generators at the next-to-leading order produce harder spectra. These measurements have been also included in the PDF fits, contributing to a sensible reduction of the gluon PDF uncertainty at large $x$.

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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