Axial U(1) symmetry and mesonic correlators at high temperature in N_f=2 lattice QCD

2020/01/22 by Kei Suzuki, Sinya Aoki, Suzuki, Kei +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2001.07962

openalex publication_date 2020/01/22 · openalex created_date 2020/01/30 · openalex updated_date 2026/07/28

Abstract

We investigate the high-temperature phase of QCD using lattice QCD simulations with N_f = 2 dynamical Möbius domain-wall fermions. On generated configurations, we study the axial U(1) symmetry, overlap-Dirac spectra, screening masses from mesonic correlators, and topological susceptibility. We find that some of the observables are quite sensitive to lattice artifacts due to a small violation of the chiral symmetry. For those observables, we reweight the Möbius domain-wall fermion determinant by that of the overlap fermion. We also check the volume dependence of observables. Our data near the chiral limit indicates a strong suppression of the axial U(1) anomaly at temperatures ≥ 220 MeV.

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