I encountered a paper in which the authors presented parton-level cross sections as a function of these variables: incoming particle momenta, factorization scale, renormalization scale, and strong coupling constant at the renormalization scale. I used to think that QCD factorization scale should always be set to equal the renormalization scale.(adsbygoogle = window.adsbygoogle || []).push({});

When they are not equal, how does such a calculation proceed?

(Of course, the result is integrated with the parton distribution function at the factorization scale to give the final answer.)

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# Can factorization scale be different from renormalization scale in QCD calculations?

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