We consider a method for determining the QCD strong coupling constant using fits of perturbative predictions for event shape averages to data collected at the LEP, PETRA, PEP and TRISTAN colliders. To obtain highest accuracy predictions we use a combination of perturbative \({{{\mathcal {O}}}}(\alpha _{S}^{3})\) calculations and estimations of the \({{{\mathcal {O}}}}(\alpha _{S}^{4})\) perturbative coefficients from data. We account for non-perturbative effects using modern Monte Carlo event generators and analytic hadronization models. The obtained results show that the total precision of the \(\alpha _{S}\) determination cannot be improved significantly with the higher-order perturbative QCD corrections alone, but primarily requires a deeper understanding of the non-perturbative effects.

我们考虑一种使用事件形状平均的摄动预测与LEP，PETRA，PEP和TRISTAN对撞机收集的数据的拟合来确定QCD强耦合常数的方法。为了获得最高准确度的预测，我们使用摄动\（{{{\ mathcal {O}}}}}（\ alpha _ {S} ^ {3}）\）计算和\（{{{\ mathcal {O}}}}（\ alpha _ {S} ^ {4}）\）来自数据的摄动系数。我们使用现代蒙特卡洛事件生成器和解析强子化模型说明了非微扰效应。获得的结果表明\（\ alpha _ {S} \）的总精度 单凭高阶扰动QCD校正无法显着改善确定性，但主要需要对非扰动效应有更深入的了解。