We compare two approaches to evaluate cross sections of heavy-quarkonium production at next-to-leading order in nonrelativistic QCD involving S- and P-wave Fock states: the customary approach based on phase space slicing and the approach based on dipole subtraction recently elaborated by us. We find reasonable agreement between the numerical results of the two implementations, but the dipole subtraction implementation outperforms the phase space slicing one both with regard to accuracy and speed.

中文翻译：

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NLO NRQCD重夸张产量计算中的偶极减法与相空间切片

我们比较了两种方法来评估涉及S和P波Fock状态的非相对论QCD中接近领先的重水族馆生产的横截面：基于相空间切片的惯用方法和基于偶极减法的常规方法被我们。我们发现这两种实现的数值结果之间存在合理的一致性，但偶极减法实现的相位空间在精度和速度方面均优于将两者相切的方法。