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Axial U(1) symmetry near the pseudocritical temperature in N_f=2+1 lattice QCD with chiral fermions

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arxiv 2401.14022 v1 pith:AGHEZQHC submitted 2024-01-25 hep-lat hep-ph

Axial U(1) symmetry near the pseudocritical temperature in N_f=2+1 lattice QCD with chiral fermions

Sinya Aoki , Yasumichi Aoki , Hidenori Fukaya , Shoji Hashimoto , Issaku Kanamori , Takashi Kaneko , Yoshifumi Nakamura , Christian Rohrhofer
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Kei Suzuki David Ward (JLQCD Collaboration)
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classification hep-lat hep-ph
keywords fermionschirallatticemassesnearsusceptibilitytemperatureanomaly
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We study the $U(1)_A$ anomaly at high temperatures of $N_f=2+1$ lattice QCD with chiral fermions. Gauge ensembles are generated with M\"obius domain-wall (MDW) fermions, and the measurements are reweighted to those with overlap fermions. We report on the results for the Dirac spectra, the $U(1)_A$ susceptibility, and the topological susceptibility in the temperature range of $T=136$, $153$, $175$, and $204$ MeV, where the up and down quark masses are set to be near the physical point as well as at lighter or heavier masses.

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Cited by 2 Pith papers

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  1. Dirac mode localization in QCD near the crossover temperature

    hep-lat 2026-02 conditional novelty 6.0

    Low-lying Dirac modes in QCD localize at Tloc ≈ 155–158 MeV, the same temperature range as the chiral crossover.

  2. The QCD phase diagram for three-flavor M\"obius domain-wall fermions

    hep-lat 2026-06 unverdicted novelty 4.0

    Lattice simulations with Möbius domain-wall fermions find the three-flavor QCD transition at mu_B=0 is a continuous crossover at pseudocritical quark masses of 184(10) MeV (Nt=6), 36-39 MeV (Nt=8), and 3.5-3.7 MeV (Nt...