Anomalous Chiral Symmetry Breaking above the QCD Phase Transition

Abstract

We study the anomalous breaking of U_A(1) symmetry just above the QCD phase transition for zero and two flavors of quarks, using a staggered fermion, lattice discretization. The properties of the QCD phase transition are expected to depend on the degree of U_A(1) symmetry breaking in the transition region. For the physical case of two flavors, we carry out extensive simulations on a 16^3 x 4 lattice, measuring a difference in susceptibilities which is sensitive to U_A(1) symmetry and which avoids many of the staggered fermion discretization difficulties. The results suggest that anomalous effects are at or below the 15% level.

10 pages including 2 figures and 1 table

References in corpus (3)

• Thermodynamics using Wilson and Staggered Quarks
• Topology, fermionic zero modes and flavor singlet correlators in finite temperature QCD
• Topology, fermionic zero modes and flavor singlet correlators in finite temperature QCD

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