科研之友
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摘要
It is known that the correlator of one axial and two vector currents, that receives leading contributions through one-loop fermion triangle diagrams, is not modified by QCD radiative corrections at two loops. It was suggested that this non-renormalization of the < VVA > correlator persists in higher orders in perturbative QCD as well. To check this assertion, we compute the three-loop QCD corrections to the < VVA > correlator using the technique of asymptotic expansions. We find that these corrections do not vanish and that they are proportional to the QCD beta-function.
- 出版日期2013-1-29
