PIRSA:13030099 Scientific Series Particle Physics

DOI10.48660/13030099

Series: Particle Physics

Melnikov, K. (2013). The correlator of two vector and one axial current in QCD. Perimeter Institute. https://pirsa.org/13030099

Melnikov, Kirill. The correlator of two vector and one axial current in QCD. Perimeter Institute, Mar. 05, 2013, https://pirsa.org/13030099 

@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}}
}

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, 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.

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