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ID 14449
file
creator
Aoki, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Kaneya, K.
Kaneko, T.
Kuramashi, Y.
Onogi, T.
Tsutsui, N.
Ukawa, A.
Yamada, N.
Yoshie, T.
JLQCD, Collaboration
subject
B0-anti-B0
B parameter
NRQCD
O(a)-improved Wilson action
NDC
Physics
abstract
We present our results of lattice calculations of B parameters, which parametrize ΔB=2 transition amplitudes together with the leptonic decay constant. Calculations are made in the quenched approximation at β=5.7, 5.9, 6.0 and 6.1, using NRQCD action for heavy quarks and the O(a)-improved Wilson action for light quarks. The operators are perturbatively renormalized including the correction of O(αs/(aM)m) (m>~0). We examine the scaling behavior of B parameters, and discuss the systematic uncertainties based on the results with several different truncations of higher order terms in 1/M and αs expansions. We find BBd(mb)=0.84(3)(5), BBs/BBd=1.020(21)(+15-16)(+5-0) and BSs(mb)=0.85(1)(5)(+1-0) in the quenched approximation. The errors represent statistical and systematic errors as well as the uncertainty in the determination of strange quark mass.
journal title
Physical Review D
volume
Volume 67
issue
Issue 1
start page
014506
date of issued
2003-01
publisher
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) 2003 American Physical Society
relation url
department
Graduate School of Science