Editing Anomaly (physics) (section)

===Scaling and renormalization===

The most prevalent global anomaly in physics is associated with the violation of [[scale invariance]] by quantum corrections, quantified in [[renormalization]].
Since regulators generally introduce a distance scale, the classically scale-invariant theories are subject to [[renormalization group]] flow, i.e., changing behavior with energy scale.  For example, the large strength of the [[strong nuclear force]] results from a theory that is weakly coupled at short distances flowing to a strongly coupled theory at long distances, due to this scale anomaly.