Light Quarks in the Instanton Vacuum at Finite Baryon Density

Details Light Quarks in the Instanton Vacuum at Finite Baryon Density Light Quarks in the Instanton Vacuum at Finite Baryon Density

1998-12-19

arxiv.org/abs/hep-ph/9812445v2

Phys.Rev. D60 (1999) 016004

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 8 figures, LaTeX, minor typos corrected

Scientific paper

10.1103/PhysRevD.60.016004

We consider the finite density, zero-temperature behaviour of quark matter in the instanton picture. Since the instanton-induced interactions are attractive in both $\bar{q}q$ and $qq$ channels, a competition ensues between phases of matter with condensation in either or both. It results in chiral symmetry restoration due to the onset of diquark condensation, a `colour supercondutor', at finite density. Also present is a state with both manners of condensation, however this phase is found to be thermodynamically disfavoured for equilibrium matter. Properties of quark matter in each phase are discussed, with emphasis on the microscopic effects of the effective mass and superconducting energy gap.

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