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ID 14489
file
creator
CP-PACS, Collaboration
Ali Khan, A
Aoki, S
Aoki, Y
Burkhalter, R
Ejiri, S
Fukugita, M
Hashimoto, S
Ishizuka, N
Iwasaki, Y
Izubuchi, T
Kanaya, K
Kaneko, T
Kuramashi, Y
Manke, T
Nagai, K. I.
Noaki, J
Shanahan, H. P.
Taniguchi, Y
Ukawa, A
Yoshié, T
NDC
Physics
abstract
We investigate the chiral properties of quenched domain-wall QCD (DWQCD) at the lattice spacings a-1≃1 and 2 GeV for both plaquette and renormalization-group (RG) improved gauge actions. In the case of the plaquette action we find that the quark mass defined through the axial Ward-Takahashi identity remains non-vanishing in the DWQCD chiral limit that the bare quark mass mf→0 and the length of the fifth dimension Ns→∞, indicating that chiral symmetry is not realized with quenched DWQCD up to a-1≃2 GeV. The behavior is much improved for the RG-improved gauge action: while a nonvanishing quark mass remains in the chiral limit at a-1≃1 GeV, the result at a-1≃2 GeV is consistent with an exponentially vanishing quark mass in the DWQCD chiral limit, indicating the realization of exact chiral symmetry. An interpretation and implications are briefly discussed.
journal title
Physical Review D
volume
Volume 63
start page
114504
date of issued
2001
publisher
The American Physical Society
issn
1550-7998
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2001 The American Physical Society
relation url
department
Graduate School of Science