The Chiral Phase Transition and Instanton Anti-instanton Molecules

Abstract

We explore the idea that the chiral phase transition in QCD can be described as a transition from a disordered instanton liquid to a strongly correlated phase of polarized instanton anti-instanton molecules. We find a number of non perturbative effects caused by the presence of instantons above T_c, among them the fact that instantons contribute to the euquation of state. We also study how instantons affect the propagation of light quarks at high temperature and determine the spacelike screening masses for mesons and baryons. We derive the corresponding effective interaction and find that the interaction in the scalar-pseudoscalar channel is attractive and four times stronger than the one in the vector-axial-vector channel, in agreement with recent lattice QCD simulations.

31 pages, 10 figures (appended as uuencoded ps files), SUNY-NTG-94-24

References in corpus (9)

• Evidence for the Role of Instantons in Hadron Structure from Lattice QCD
• Baryonic Correlation Functions in the Random Instanton Vacuum
• Weinberg-Type Sum Rules at Zero and Finite Temperature
• Quark-Induced Correlations between Instantons Drive the Chiral Phase Transition
• Correlation Functions of Hadron Currents in the QCD Vacuum Calculated in Lattice QCD
• The Instanton Density at Finite Temperatures
• Spatial and Temporal Hadron Correlators below and above the Chiral Phase Transition
• Baryonic and Gluonic Correlators in Hot QCD
• Hadronic Wave Functions in the Instanton Model

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• Phases of circle-compactified QCD with adjoint fermions at finite density
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• Spontaneous Symmetry Breaking and Phase Coexistence in Two-Color Networks
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• Short Range Linear Potential in 3D Lattice Compact QED
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• The Pauli Form Factor of Quark and Nontrivial Topological Structure of the QCD
• Topological zero modes at nonzero chemical potential
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