The VVA correlator at three loops in perturbative QCD
High Energy Physics - Phenomenology
2015-06-11 v1
Abstract
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 VAA-correlator u sing the technique of asymptotic expansions. We find that these corrections do not vanish and that they are proportional to the QCD beta-function.
Cite
@article{arxiv.1210.0812,
title = {The VVA correlator at three loops in perturbative QCD},
author = {Jorge Mondejar and Kirill Melnikov},
journal= {arXiv preprint arXiv:1210.0812},
year = {2015}
}
Comments
10 pages