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arXiv 2103.15846hep-ph
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LHeC上单顶夸克产生的微分分布

Differential distributions for Single Top Quark Production at the LHeC

Meisen Gao, Jun Gao

摘要:

在QCD中,我们对大型强子电子对撞机(LHeC)中次领先阶(NLO)轻子衰变产生单顶(反)夸克进行了唯象研究。我们专注于各种不同的分布在一个基准区域。非线性光学修正可以使基准截面减小14%。我们发现,非线性光学预测表现出较强的稳定性下的尺度变化的大多数观测量考虑,而在领导阶(LO)的尺度变化占主导地位的理论不确定性。本文提出了一种利用带电轻子平均横动量测量顶夸克质量的方法。在非线性光学的尺度变化引起约1.3 GeV的提取顶夸克质量的理论不确定性。提取的顶夸克质量的统计误差为1.1 GeV。我们还研究了QCD修正和尺度变化对寻找反常Wtb耦合的影响。

英文摘要:

We present a phenomenological study of the single top (anti-)quark production with leptonic decays at the Large Hadron electron Collider (LHeC) at the next-to-leading-order (NLO) in QCD. We focus on various differential distributions in a fiducial region. The NLO corrections can reduce the fiducial cross section by 14%. We find the NLO predictions exhibit strong stability under scale variations for most observables considered while the scale variations at the leading-order (LO) dominated in the theoretical uncertainties. We propose a method of determining the top-quark mass using the measurement of the average transverse momentum of the charged lepton. The scale variations at the NLO induce a theoretical uncertainty of about 1.3 GeV of the extracted top-quark mass. The statistical error of the extracted top-quark mass amounts to 1.1 GeV. We also investigate the impact of the QCD corrections and the scale variations in searches of the anomalous Wtb couplings.

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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