The explicit expression for the \(R\)-ratio of electron–positron annihilation into hadrons, which properly accounts for all the effects due to continuation of the perturbative QCD results from spacelike into timelike domain, is obtained at an arbitrary loop level.

中文翻译：

---

R ⁺ e ⁺ e的 比率 ^– →强子：显式形式

电子-正电子an没成强子的\（R \）比率的显式表达式可在任意循环水平上获得，该表达式正确地解释了由于扰动QCD结果从时空变为时域而导致的所有影响。