このエントリーをはてなブックマークに追加
ID 14531
file
Thumnail p5711_1.pdf 183 KB
creator
JLQCD, Collaboration
Aoki, S
Fukugita, M
Hashimoto, S
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kuramashi, Y
Ukawa, A
Yoshié, T
NDC
Physics
abstract
A quenched lattice QCD calculation of the B and D meson decay constants is presented. To investigate scaling violation associated with the heavy quarks, parallel simulations are carried out employing both Wilson and the O(a)-improved clover quark actions. The discretization errors due to the large b quark mass are estimated with the aid of the nonrelativistic interpretation approach of El-Khadra, Kronfeld, and Mackenzie [Phys. Rev. D 55, 3933 (1997)]. As the best values from our simulations at β = 5.9, 6.1, and 6.3 we obtain fB = 173(4) MeV, fBs = 1993 MeV for B mesons and fD = 1972 MeV, fDs = 2242 MeV for D mesons where the errors are statistical. In addition we expect a 5% ( 7-1.973389or D mesons) systematic error and a 5 6.880872e-316rror in the uncertainty to determine the lattice scale, besides the quenching error, which is not estimated in this Letter.
journal title
Physical Review Letters
volume
Volume 80
start page
5711
end page
5715
date of issued
1998
publisher
The American Physical Society
issn
0031-9007
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1998 The American Physical Society
relation is version of URL
http://dx.doi.org/10.1103/PhysRevLett.80.5711
department
Graduate School of Science