Infrared behavior and running couplings in interpolating gauges in QCD
- IPPP, University of Durham, Durham DH1 3LE (United Kingdom)
- New York University, New York, New York 10003 (United States)
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.
- OSTI ID:
- 20711435
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevD.72.054005; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
The quark-gluon vertex in Landau gauge QCD: Its role in dynamical chiral symmetry breaking and quark confinement
Infrared singularities in Landau gauge Yang-Mills theory