Melnikov, K. (2013). The correlator of two vector and one axial current in QCD. Perimeter Institute. https://pirsa.org/13030099
MLA
Melnikov, Kirill. The correlator of two vector and one axial current in QCD. Perimeter Institute, Mar. 05, 2013, https://pirsa.org/13030099
BibTex
@misc{ pirsa_PIRSA:13030099,
doi = {10.48660/13030099},
url = {https://pirsa.org/13030099},
author = {Melnikov, Kirill},
keywords = {Particle Physics},
language = {en},
title = {The correlator of two vector and one axial current in QCD},
publisher = {Perimeter Institute},
year = {2013},
month = {mar},
note = {PIRSA:13030099 see, \url{https://pirsa.org}}
}
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, I compute the three-loop QCD corrections to the
VAA-correlator using the technique of asymptotic expansions. I find that
these corrections do not vanish and that they are proportional to the QCD
beta-function. I will also review some properties of the VVA correlator that were discovered in recent years.
