Continuum extrapolation of lattice QCD data shows that SU(2)_L × SU(2)_R chiral and U(1)_A axial symmetry breaking strengths in nonsinglet quark-connected channels converge to the same value near the chiral crossover temperature.
Possible New Phase of Thermal QCD,
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Derives a regularized formula for the gluon condensate from the Dirac spectral density, linking it to the quark condensate and clarifying anomalous versus spontaneous symmetry breaking in QCD.
Lattice QCD finds evidence for effective U(1)_A symmetry restoration at 319(22) MeV, well above the chiral crossover.
citing papers explorer
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RG-Invariant Symmetry Ratio for QCD: A Study of $U(1)_A$ and Chiral Symmetry Restoration
Continuum extrapolation of lattice QCD data shows that SU(2)_L × SU(2)_R chiral and U(1)_A axial symmetry breaking strengths in nonsinglet quark-connected channels converge to the same value near the chiral crossover temperature.
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Glue Condensate, Quark Condensate and Dirac Spectral Density
Derives a regularized formula for the gluon condensate from the Dirac spectral density, linking it to the quark condensate and clarifying anomalous versus spontaneous symmetry breaking in QCD.
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On the effective restoration of $U(1)_A$ symmetry at finite temperature
Lattice QCD finds evidence for effective U(1)_A symmetry restoration at 319(22) MeV, well above the chiral crossover.