Why is QCD non-perturbative at low energies?(adsbygoogle = window.adsbygoogle || []).push({});

In QCD isn't the expansion parameter the fine structure constant?

[tex] \alpha_s \approx \frac{1}{137} [/tex]

Does this somehow depend on energy, which wouldn't make sense to me. I cannot seem to find a good answer anywhere, so I thought I would ask here.

Thanks.

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# Why is QCD non-perturbative at low energies?

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