Infrared behavior and running couplings in interpolating gauges in QCD

Christian S. Fischer, Daniel Zwanziger

    Research output: Contribution to journalArticle

    Abstract

    We consider the class of gauges that interpolates between Landau- and Coulomb-gauge QCD, and show the nonrenormalization of the two independent ghost-gluon vertices. This implies the existence of two renormalization group (RG)-invariant running couplings, one of which is interpreted as an RG-invariant gauge parameter. We also present the asymptotic infrared limit of solutions of the Dyson-Schwinger equations in interpolating gauges. The infrared critical exponents of these solutions as well as the resulting infrared fixed point of one of the couplings are independent of the gauge parameter. This coupling also has a fixed point in the Coulomb-gauge limit and constitutes a second invariant charge besides the well known color-Coulomb potential.

    Original languageEnglish (US)
    Article number054005
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume72
    Issue number5
    DOIs
    StatePublished - Sep 1 2005

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    Gauge
    Infrared
    quantum chromodynamics
    Renormalization Group
    Invariant
    Fixed point
    Coulomb Potential
    Coulomb potential
    ghosts
    Critical Exponents
    apexes
    Interpolate
    Charge
    exponents
    color
    Imply

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Mathematical Physics

    Cite this

    Infrared behavior and running couplings in interpolating gauges in QCD. / Fischer, Christian S.; Zwanziger, Daniel.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 72, No. 5, 054005, 01.09.2005.

    Research output: Contribution to journalArticle

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