QCD phases at high density and instantons

Abstract

The talk is an introduction into diquark condensation phenomena which occur in QCD at high energy density. They are driven by instantons and instanton-antiinstanton pairs (or ``molecules''), which generate attraction in some qq channels. A number of phases is possible, with or without restoration of chiral symmetry: the work is not finished and we do not yet know which take place in real QCD. We also emphasize that specific diquark correlations play a significant role in baryon structure, in particular making that of a nucleon very different of a $\Delta$ (or other member of a decuplet). This ``small $N_c$'' scenario based on comparison to QCD with two colors is contrasted with the ``large $N_c$'' one.

invited talk at "QCD at finite baryon density", Bielefeld, 1998

References in corpus (5)

• QCD at Finite Baryon Density: Nucleon Droplets and Color Superconductivity
• Signatures of the Tricritical Point in QCD
• Equation of State, Radial Flow and Freeze-out in High Energy Heavy Ion Collisions
• Event-by-event analysis of heavy ion collisions and thermodynamical fluctuations
• Coulomb Effects on Particle Spectra in Relativistic Nuclear Collisions

Cited by in corpus (5)

• Dyson-Schwinger Equations: Density, Temperature and Continuum Strong QCD
• Signatures of Quark-Gluon-Plasma formation in high energy heavy-ion collisions: A critical review
• Colour Deconfinement in Nuclear Collisions
• Effect of Light Fermions on the Confinement Transition in QCD-like Theories
• Modeling (anti)deuteron formation at RHIC with a geometric coalescence model