Low-Energy Dynamics in Ultradegenerate QCD Matter
Abstract
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 ΛQCD. We show that there is a systematic low-energy expansion in powers of (ω/m)1/3, where ω 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 |k→|≫k0. If the external momenta and energies satisfy |k→|∼k0, planar, Abelian ladder diagrams involving the full quark propagator have to be resummed but the corresponding Dyson-Schwinger equations are closed.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2006
- DOI:
- 10.1103/PhysRevLett.97.092301
- arXiv:
- arXiv:hep-ph/0512309
- Bibcode:
- 2006PhRvL..97i2301S
- Keywords:
-
- 12.38.Mh;
- 25.75.Nq;
- Quark-gluon plasma;
- Quark deconfinement quark-gluon plasma production and phase transitions;
- High Energy Physics - Phenomenology;
- Condensed Matter - Superconductivity
- E-Print:
- 4 pages, published version