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arXiv 2512.08573hep-ex
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单个顶夸克和顶反夸克的差分 $t$-通道产生截面测量:在 $\sqrt{s} = $13 TeV 时使用 ATLAS探测器

Measurement of the differential $t$-channel production cross-section of single top quarks and top antiquarks at $\sqrt{s} = $13 TeV with the ATLAS detector

University of Wuppertal(伍珀塔尔大学)

Maren Stratmann

AI总结:

利用 ATLAS 探测器在 13 TeV 能量下测量单个顶夸克和顶反夸克的差分产生截面,并与理论预测进行比较,结果在不确定性范围内一致,并对四费米子算符设定了限制。

摘要:

在质子-质子碰撞中,利用 $\sqrt{s} = $13 TeV 的中心对称能量,测量了单个顶夸克和顶反夸克的差分产生截面。使用 ATLAS探测器在 2015-2018 年收集的完整 Run-2 数据集。截面作为顶 (反)夸克的横向动量和绝对快速度的函数进行测量。测量结果与固定阶计算、不同矩阵元事件生成器和不同部分子分布函数集的预测进行比较。结果在测量不确定性范围内与理论预测一致。测量结果对四费米子算符 $O_{Qq}^{3,1}$ 的贡献设定了限制。

英文摘要:

Differential production cross-sections of single top quarks and top antiquarks are measured in proton-proton collisions at a centre-of-mass energy $\sqrt{s} = $13 TeV. The full Run-2 dataset collected by the ATLAS detector at the LHC in the years 2015-2018 is used. The differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top (anti)quark. The measurement results are compared to predictions obtained from fixed order calculations, different matrix-element event generators and different parton distribution function sets. The results agree with the theoretical predictions within the measurement uncertainties. An effective field theory interpretation of the measurement sets constraints on the contribution of the four-fermion operator $O_{Qq}^{3,1}$.

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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