Speaker
Dr
Akio Tomiya
(Osaka university)
Description
We study the U(1)A anomaly in two-flavor lattice QCD at finite
temperature using the Ginsparg-Wilson fermions.
The gauge configurations are generated with the Mobius domain-wall
fermion at and above the critical temperature on 32^3x8 and 32^3x12
lattices. We apply the reweighting of the fermion determinant to that of
domain-wall fermion satisfying the GW relation exactly. The results for
low-lying eigenmodes are significantly different, indicating that even a
small violation of the GW relation may strongly affect the low-modes. We
find a strong suppression of the low-modes after the reweighting, which
suggests vanishing U(1)A in the chiral limit.
Primary author
Dr
Akio Tomiya
(Osaka university)
Co-authors
Dr
Guido Cossu
(KEK)
Dr
Hidenori Fukaya
(Osaka University)
Dr
Jun Noaki
(KEK)
Prof.
Shoji Hashimoto
(KEK)
Prof.
Sinya Aoki
(Kyoto University)
Dr
Takashi Kaneko
(KEK)
