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Decay constants of heavy-light mesons in heavy quark effective theory
黄涛(理); Luo CW(罗传望); Huang, T; Luo, CW
1996
Source PublicationPHYSICAL REVIEW D
Volume53Issue:9Pages:5042-5050
Corresponding AuthorCCAST,WORLD LAB,BEIJING 100080,PEOPLES R CHINA
SubtypeArticle
AbstractThe SU(3)-breaking effects in the leading and subleading parameters appearing in the heavy quark expansion of decay constants of the heavy-light mesons are systematically analyzed to two loop accuracy using QCD sum rules. We find that the SU(3)-breaking effects in the decay constant of the pseudoscalar are, respectively, about 20% for the b-flavored meson, 17% for the charmed meson, i.e., f(Bs)/f(B)=1.20+/-0.04+/-0.03, f(Ds)/f(D)=1.17+/-0.03+/-0.03 (the first error comes from the sum rule uncertainty, the second one from the uncertainty in the strange quark mass) and, in the expansion of f(ps) root(mps)/root m(p), the subleading order is about similar to 3% of the corresponding leading one for the b-flavored meson, about -5.5% for the charmed meson, and depends on the strange quark mass very weakly. In addition, the ratios of the vector to pseudoscalar meson decay constants are found to be f(Bs)*/f(Bs)=fB*/f(B)=1.05+/-0.02+/-0.00, and the SU(3)-breaking effect in the mass is about 102+/-16+/-20 MeV.
Subject AreaAstronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.53.5042
URL查看原文
Indexed ByINSPIREHEP ; ADS
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:A1996UJ48700036
ADS Bibcode1996PhRvD..53.5042H
ADS URLhttps://ui.adsabs.harvard.edu/abs/1996PhRvD..53.5042H
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/1996PhRvD..53.5042H/citations
inspireid405637
inspireURLhttps://inspirehep.net/literature/405637
Citation statistics
Cited Times:11 [INSPIRE]
Cited Times:8 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/240007
Collection理论物理室
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Huang T,Luo CW,Huang, T,et al. Decay constants of heavy-light mesons in heavy quark effective theory[J]. PHYSICAL REVIEW D,1996,53(9):5042-5050.
APA 黄涛,罗传望,Huang, T,&Luo, CW.(1996).Decay constants of heavy-light mesons in heavy quark effective theory.PHYSICAL REVIEW D,53(9),5042-5050.
MLA 黄涛,et al."Decay constants of heavy-light mesons in heavy quark effective theory".PHYSICAL REVIEW D 53.9(1996):5042-5050.
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