2009/03/31 by Lorenz von Smekal, Kim Maltman, André Sternbeck +1 · 3 citations
Physics and Astronomy · #Coupling (piping) #Mathematical analysis #Physics #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Scheme (mathematics) #Theoretical and Computational Physics #hep-lat #hep-ph
paper · pdf · doi:10.1016/j.physletb.2009.10.030
published as Phys.Lett.B681:336-342,2009 · 8 pages, 4 tables. Revised and extended version accepted for publication in PLB. References and a note on quark mass effects added
openalex publication_date 2009/10/18 · arxiv created 2009/10/21 · arxiv updated 2010/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We introduce the minimal momentum subtraction (MiniMOM) scheme for QCD. Its definition allows the strong coupling to be fixed solely through a determination of the gluon and ghost propagators. In Landau gauge this scheme has been implicit in the early studies of these propagators, especially in relation to their non-perturbative behaviour in the infrared and the associated infrared fixed-point. Here we concentrate on its perturbative use. We give the explicit perturbative definition of the scheme and the relation of its beta-function and running coupling to the MSbar scheme up to 4-loop order in general covariant gauges. We also demonstrate, by considering a selection of Nf=3 examples, that the apparent convergence of the relevant perturbative series can in some (though not all) cases be significantly improved by re-expanding the MSbar coupling version of this series in terms of the MiniMOM coupling, making the MiniMOM coupling also of potential interest in certain phenomenological applications.