Nonperturbative O(a) improvement of Wilson quark action in three-flavor QCD with plaquette gauge action
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00014603
ID | 14603 |
file | |
creator |
JLQCD, Collaboration
CP-PACS, Collaboration
Fukugita, M
Hashimoto, S
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kaneko, T
Kuramashi, Y
Taniguchi, Y
Tsutsui, N
Ukawa, A
Yoshié, T
|
NDC |
Physics
|
abstract | We perform a nonperturbative determination of the O(a)-improvement coefficient cSW for the Wilson quark action in three-flavor QCD with the plaquette gauge action. Numerical simulations are carried out in a range of beta=12.0–5.2 on a single lattice size of 83×16 employing the Schrödinger functional setup of lattice QCD. As our main result, we obtain an interpolation formula for cSW and the critical hopping parameter Kc as a function of the bare coupling. This enables us to remove the O(a) scaling violation from physical observables in future numerical simulation in the wide range of beta. Our analysis with a perturbatively modified improvement condition for cSW suggests that finite volume effects in cSW are not large on the 83×16 lattice. We investigate Nf dependence of cSW by additional simulations for Nf=4, 2, and 0 at beta=9.6. As a preparatory step for this study, we also determine cSW in two-flavor QCD at beta=5.2. At this beta, several groups have carried out large-scale calculations of the hadron spectrum, while no systematic determination of cSW has been performed.
|
journal title |
Physical Review D
|
volume | Volume 71
|
start page | 054505
|
date of issued | 2005
|
publisher | The American Physical Society
|
issn | 1550-7998
|
language |
eng
|
nii type |
Journal Article
|
HU type |
Journal Articles
|
DCMI type | text
|
format | application/pdf
|
text version | publisher
|
rights | Copyright (c) 2005 The American Physical Society
|
relation is version of URL | http://dx.doi.org/10.1103/PhysRevD.71.054505
|
department |
Graduate School of Science
|