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NNLO compatibility between pQCD theory and phenomenology in determination of the b-quark pole and MS¯ running masses
Modern Physics Letters A ( IF 1.5 ) Pub Date : 2020-08-08 , DOI: 10.1142/s0217732320502533
A. Vafaee 1, 2 , K. Javidan 1
Affiliation  

This contribution attempts to determine the [Formula: see text]-quark pole mass [Formula: see text] and [Formula: see text] running mass [Formula: see text] with two different approaches at the next-to-next-to-leading order (NNLO) corrections. At the first approach, we derive a relation between the [Formula: see text]-quark pole mass [Formula: see text] and its [Formula: see text] running mass [Formula: see text] at the NNLO corrections based on the perturbative Quantum Chromo Dynamics (pQCD) predictions. At the second approach, we extract numerical values of the [Formula: see text]-quark pole and [Formula: see text] running masses based on the NNLO phenomenology of H1 and ZEUS Collaborations combined beauty vertex production experimental data. Then we discuss about the compatibility between the pQCD theory results and phenomenology approach in determination of the [Formula: see text]-quark pole and [Formula: see text] running masses at the NNLO corrections. Also, we investigate the role and influence of the [Formula: see text]-quark mass as an extra degree of freedom added to the input parameters of the Standard Model Lagrangian, on the improvement of the uncertainty band of the proton parton distribution functions (PDFs) and particularly on the gluon distribution.

中文翻译:

pQCD 理论和现象学在确定 b-夸克极和 MS¯ 运行质量中的 NNLO 兼容性

该贡献试图确定[公式:见正文]-夸克极质量[公式:见正文]和[公式:见正文]运行质量[公式:见正文]在next-to-next-to有两种不同的方法- 前导顺序 (NNLO) 更正。在第一种方法中,我们根据 NNLO 修正推导出 [公式:见文本]-夸克极质量 [公式:见文本] 与其 [公式:见文本] 运行质量 [公式:见文本] 之间的关系微扰量子色动力学(pQCD)预测。在第二种方法中,我们基于 H1 和 ZEUS Collaborations 的 NNLO 现象学结合美顶点生产实验数据,提取 [公式:见文本]-夸克极和 [公式:见文本] 运行质量的数值。然后我们讨论了 pQCD 理论结果和现象学方法在确定 [公式:见文本]-夸克极和 [公式:见文本] 在 NNLO 校正时运行质量的兼容性。此外,我们研究了[公式:见正文]-夸克质量作为标准模型拉格朗日输入参数中添加的额外自由度对质子部分分布函数不确定带的改进的作用和影响( PDF),尤其是胶子分布。
更新日期:2020-08-08
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