Decay constants of heavy-light mesons in heavy quark effective theory
文献类型：期刊论文
| 作者 | 黄涛(理) ; Luo CW(罗传望); Huang, T; Luo, CW
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 1996 |
| 卷号 | 53期号:9页码:5042-5050 |
| 通讯作者 | CCAST,WORLD LAB,BEIJING 100080,PEOPLES R CHINA |
| 英文摘要 | The 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1996UJ48700036 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240007]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：高能物理研究所
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