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arXiv 2302.01283hep-ex
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利用ATLAS探测器观测到与光子关联产生的单顶夸克

Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector

ATLAS Collaboration

AI总结:

利用ATLAS探测器数据,观测到与光子关联产生的单顶夸克,直接探测顶夸克电弱耦合,测得基准截面为688 fb,与标准模型预测相符。

摘要:

本文报告了对与光子一起产生的单顶夸克的观测,这直接探测了顶夸克的电弱耦合。该分析利用了大型强子对撞机上ATLAS探测器收集的139 fb$^{-1}$的13 TeV质子-质子碰撞数据。要求光子的横向动量大于20 GeV且在探测器接收范围内,测得基准截面为688 $\pm$ 23(统计)$^{+75}_{-71}$(系统)fb,与量子色动力学次领头阶的标准模型预测515 $^{+36}_{-42}$ fb相比较。

英文摘要:

This Letter reports the observation of single top quarks produced together with a photon, which directly probes the electroweak coupling of the top quark. The analysis uses 139 fb$^{-1}$ of 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. Requiring a photon with transverse momentum larger than 20 GeV and within the detector acceptance, the fiducial cross section is measured to be 688 $\pm$ 23 (stat.) $^{+75}_{-71}$ (syst.) fb, to be compared with the standard model prediction of 515 $^{+36}_{-42}$ fb at next-to-leading order in QCD.

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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