Running coupling in the conformal window of large-Nf QCD
arXiv:1405.7031 · doi:10.1007/JHEP11(2014)035
Abstract
Quantum Chromodynamics with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the beyond-tree-level tensor structures of the quark-gluon vertex.
22 pages, 10 figures, additional clarifications and a reference added, version accepted by JHEP
References in corpus (4)
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- Color, Flavor, Temperature and Magnetic Field Dependence of QCD Phase Diagram: Magnetic Catalysis and its Inverse
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- Dynamical Chiral Symmetry Breaking in Quantum Chromo Dynamics: Delicate and Intricate
- Color-flavor dependence of the Nambu-Jona-Lasinio model and QCD phase diagram
- On the phase structure of extra-dimensional gauge theories with fermions