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questions
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votes
1
answer
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Expansion at first order ${\cal O}(\alpha_s)$ in counterterms for the QCD vertex renormalization at 1-loop
What is the meaning of the expansion at first order ${\cal O}(\alpha_s)$ in $\delta_2$ and $\delta_3$ at the second step in the last line? These quantities are not "small" - on the contrary,...
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1
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Question about Renormalization of Ghosts in QCD in MS scheme
During a calculation of the Renormalization constant of the ghosts in QCD I stumbled over the following question:
When I calculate the self-energy of the Faddeev-Popov ghosts in $SU(N)$ non-abelian ...
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