2005/12/31 by Thomas Schäfer, Thomas Schafer, Kai Schwenzer
Physics and Astronomy · #Baryon #Energy (signal processing) #Gluon #High-Energy Particle Collisions Research #Lambda #Mathematical physics #Omega #Particle physics #Physics #Physics of Superconductivity and Magnetism #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #cond-mat.supr-con #hep-ph
paper · pdf · doi:10.1103/physrevlett.97.092301
published as Phys.Rev.Lett. 97 (2006) 092301 · 4 pages, published version
openalex publication_date 2006/08/28 · arxiv created 2006/08/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the low-energy behavior of QCD Green functions in the limit that the baryon chemical potential is much larger than the QCD scale parameter \ensuremathΛQCD. We show that there is a systematic low-energy expansion in powers of (\ensuremathω/m)1/3, where \ensuremathω is the energy and m is the screening scale. This expansion is valid even if the effective quark-gluon coupling g is not small. The expansion is purely perturbative in the magnetic regime |\stackrel\ensuremath→k|\ensuremath≫k0. If the external momenta and energies satisfy |\stackrel\ensuremath→k|\ensuremath∼k0, planar, Abelian ladder diagrams involving the full quark propagator have to be resummed but the corresponding Dyson-Schwinger equations are closed.