English

Renormalization of QCD in the interpolating momentum subtraction scheme at three loops

High Energy Physics - Theory 2018-04-25 v1 High Energy Physics - Phenomenology

Abstract

We introduce a more general set of kinematic renormalization schemes than the original momentum (MOM) subtraction schemes of Celmaster and Gonsalves. These new schemes will depend on a parameter ω\omega which tags the external momentum of one of the legs of the 33-point vertex functions in Quantum Chromodynamics (QCD). In each of the three new schemes we renormalize QCD in the Landau and maximal abelian gauges and establish the three loop renormalization group functions in each gauge. As an application we evaluate two critical exponents at the Banks-Zaks fixed point and demonstrate that their values appear to be numerically scheme independent in a subrange of the conformal window.

Keywords

Cite

@article{arxiv.1801.10415,
  title  = {Renormalization of QCD in the interpolating momentum subtraction scheme at three loops},
  author = {J. A. Gracey and R. M. Simms},
  journal= {arXiv preprint arXiv:1801.10415},
  year   = {2018}
}

Comments

42 latex pages, 14 tables 4 figures, anc directory contains txt file with electronic version of renormalization group functions, coupling constant mappings,conversion functions vertex functions and projection matrices