Comment on “Chiral symmetry restoration, the eigenvalue density of the Dirac operator, and the axial U(1) anomaly at finite temperature”
Abstract
Aoki, Fukaya, and Taniguchi claim that both the spectral density of the Dirac operator at the origin and the topological susceptibility must vanish identically for sufficiently small but nonzero quark mass m in the chirally symmetric phase of quantum chromodynamics with two light quark flavors, under certain technical assumptions on the spectrum and on the dependence of observables on m . I argue that a crucial step of their proof is not justified and the validity of these conclusions should be reassessed.
Fields of Study & Subjects
Topological Materials and Phenomena
Quantum Chromodynamics and Particle Interactions
Quantum Mechanics and Non-Hermitian Physics
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 114
- Issue
- 1
- Publication date
- 22 May 2026
- Language
- EN