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arXiv 0804.3992hep-ph
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希格斯玻色子衰变为底夸克和微扰QCD预言的不确定性

Higgs boson decay into bottom quarks and uncertainties of perturbative QCD predictions

A. L. Kataev, V. T. Kim

摘要:

本文讨论了用高阶微扰QCD方法计算标准模型希格斯玻色子衰变为底夸克宽度的不同处理方法。特别注意分析了在$\bar{MS}$ -方案中以b夸克质量作为运行参数和以夸克极质量作为运行参数时,衰变宽度$Γ(H\to \bar{b}b})$对$M_H$的依赖性。运行和极质量之间的关系被考虑在顺序$α_s^4$ -近似。评述了分析微扰理论应用的一些特点。

英文摘要:

Different methods for treating the results of higher-order perturbative QCD calculations of the decay width of the Standard Model Higgs boson into bottom quarks are discusssed. Special attention is paid to the analysis of the $M_H$ dependence of the decay width $Γ(H\to \bar{b}b})$ in the cases when the mass of b-quark is defined as the running parameter in the $\bar{MS}$-scheme and as the quark pole mass. The relation between running and pole masses is taken into account in the order $α_s^4$-approximation. Some special features of applications of Analytical Perturbation Theory (APT) are commented.

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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