标题： QCD微扰理论：它不是你所学的那样 显示英文标题

标题： QCD Perturbation Theory: It's not what you were taught

摘要： 在QCD中的物理量不依赖于$\alpha_s(Q)$。 无法通过实验测量$\alpha_s(Q)$。 如果这些陈述听起来令人震惊，请继续阅读。 它们实际上是众所周知的事实，尽管这些事实在QCD文献中经常被忽视。 重整化微扰理论不是普通的幂级数展开；其重整化方案的歧义不仅仅是一个小麻烦。 相反，它是一种结构，在这种结构中，耦合常数重新定义下的不变性是一种基本对称性——一种与其他任何对称性一样值得尊重的对称性。 我直言不讳，因为如果没有思维模式的改变，微扰QCD永远不可能成为一项真正的科学事业。 显示英文摘要

摘要： Physical quantities in QCD do not depend upon $\alpha_s(Q)$. There is no way to measure $\alpha_s(Q)$ experimentally. If those statements sound shocking, please read on. They are actually well-known facts, though ones that are constantly being ignored in the QCD literature. Renormalized perturbation theory is not an ordinary power-series expansion; its renormalization-scheme ambiguity is not merely a minor nuisance. Rather, it is a structure in which invariance under redefinitions of the coupling is a fundamental symmetry -- a symmetry that, like any other, deserves respect. I speak bluntly because without a change in mindset perturbative QCD can never become a proper, scientific enterprise.