| Issue |
EPJ Web Conf.
Volume 175, 2018
35th International Symposium on Lattice Field Theory (Lattice 2017)
|
|
|---|---|---|
| Article Number | 07025 | |
| Number of page(s) | 8 | |
| Section | 7 Nonzero Temperature and Density | |
| DOI | https://doi.org/10.1051/epjconf/201817507025 | |
| Published online | 26 March 2018 | |
https://doi.org/10.1051/epjconf/201817507025
Axial U(1) symmetry at high temperature in 2-flavor lattice QCD
1
KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
2
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto 606-8502, Japan
3
RIKEN BNL Research Center, Brookhaven National Laboratory, Upton NY 11973, USA
4
School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
5
Department of Physics, Osaka University, Toyonaka 560-0043, Japan
6
School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801, Japan
* Speaker, e-mail: kei.suzuki@kek.jp
Published online: 26 March 2018
We investigate the axial U(1)A symmetry breaking above the critical temperature in two-flavor lattice QCD. The ensembles are generated with dynamical Möbius domain-wall or reweighted overlap fermions. The U(1)A susceptibility is extracted from the low-modes spectrum of the overlap Dirac eigenvalues. We show the quark mass and temperature dependences of U(1)A susceptibility. Our results at T = 220MeV imply that the U(1)A symmetry is restored in the chiral limit. Its coincidence with vanishing topological susceptibility is observed.
© The Authors, published by EDP Sciences, 2018
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