论文标题
部分可观测时空混沌系统的无模型预测
Improvement of W Boson Hadronic Decay Width up to $\mathcal{O}\left(α_s^4 \right)$-order
论文作者
论文摘要
最大形式（PMC）的原理用于消除重新归一化量表和方案中的不确定性，从而消除了高精度扰动量子染色体动力学（PQCD）预测的不必要的系统误差。在这项工作中，我们使用PMC方法来改善Hadron的$ W $ Boson衰减宽度的确定，通过在四环级别上进行PQCD理论的校正。在常规规模的设置中，我们发现重新归一化的初始缩放依赖性仅在高校正顺序下很小，而在单尺度PMC方法中，我们获得了与缩放无关的初始结果。最后，$ w $的宽习惯衰减用于间接确定魅力 - 震动混合参数。
The principle of maximum conformality (PMC) is used to remove uncertainties in the renormalization scale and scheme, thus eliminating unnecessary systematic errors for high-precision perturbative Quantum Chromodynamics (pQCD) predictions. In this work, we use PMC method to improve the determination of the decay width of the $W$ boson in hadrons by working on the corrections coming from pQCD theory at the four-loop level. In conventional scale setting, we find that the initial scaling dependence of the renormalization is small only at high correction orders, whereas in single-scale PMC method we obtain a scaling-independent initial result. Finally, the wide hadronic decay of $W$ is used for an indirect determination of the charm-strange mixing parameter.
