Determination of f(+)(K) (0) and extraction of vertical bar V-cs vertical bar from semileptonic D decays
文献类型：期刊论文
| 作者 | Fang Y(方易) ; Rong G(荣刚); Ma HL(马海龙); Zhao JY(赵静宜); Fang, Y; Rong, G; Ma, HL; Zhao, JY
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| 刊名 | EUROPEAN PHYSICAL JOURNAL C
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| 出版日期 | 2015 |
| 卷号 | 75期号:1页码:10 |
| 通讯作者 | 方易 |
| 英文摘要 | By globally analyzing all existing measured branching fractions and partial rates in different four momentum transfer-squared q(2) bins of D -> Ke+v(e) decays, we obtain the product of the form factor and magnitude of Cabibbo-Kobayashi-Maskawa matrix element V-cs to be f(+)(K) (0)vertical bar V-cs vertical bar = 0.717 +/- 0.004. With this product, we determine the D -> K semileptonic form factor f(+)(K) (0) = 0.737 +/- 0.004 +/- 0.000 in conjunction with the value of vertical bar V-cs vertical bar determined from the standard model global fit. Alternately, with the product together with the input of the form factor f(+)(K) (0) calculated in lattice quantum chromo-dynamics (LQCD) recently, we extract vertical bar V-cs vertical bar (D -> Ke+ve) = 0.962 +/- 0.005 +/- 0.014, where the error is still dominated by the uncertainty of the form factor calculated in LQCD. Combining the vertical bar V-cs vertical bar(Ds+-> l+vl) = 1.012 +/- 0.015 +/- 0.009 extracted from all existing measurements of D-s(+) -> l(+)v(e) decays and vertical bar V-cs vertical bar(D -> Ke+ve) = 0.962 +/- 0.005 +/- 0.014 together, we find the most precisely determined vertical bar V-cs vertical bar to be vertical bar V-cs vertical bar = 0.983 +/- 0.011, which improves the accuracy of the PDG'2014 value vertical bar V-cs vertical bar(PDG/2014) = 0.986 +/- 0.016 by 45 %. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Particles & Fields |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000348991600008 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228147]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 推荐引用方式 GB/T 7714 | Fang Y,Rong G,Ma HL,et al. Determination of f(+)(K) (0) and extraction of vertical bar V-cs vertical bar from semileptonic D decays[J]. EUROPEAN PHYSICAL JOURNAL C,2015,75(1):10. |
| APA | 方易.,荣刚.,马海龙.,赵静宜.,Fang, Y.,...&Zhao, JY.(2015).Determination of f(+)(K) (0) and extraction of vertical bar V-cs vertical bar from semileptonic D decays.EUROPEAN PHYSICAL JOURNAL C,75(1),10. |
| MLA | 方易,et al."Determination of f(+)(K) (0) and extraction of vertical bar V-cs vertical bar from semileptonic D decays".EUROPEAN PHYSICAL JOURNAL C 75.1(2015):10. |
入库方式： OAI收割
来源：高能物理研究所
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