2014/05/31 by Markus Hopfer, Christian S. Fischer, Reinhard Alkofer
Physics and Astronomy · #Coupling (piping) #Critical phenomena #Fermion #Gauge theory #Gluon #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Tensor (intrinsic definition) #hep-lat #hep-ph
paper · pdf · doi:10.1007/jhep11(2014)035
22 pages, 10 figures, additional clarifications and a reference added, version accepted by JHEP
arxiv created 2014/10/01 · openalex publication_date 2014/11/01 · arxiv updated 2015/06/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.