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 Study of dynamics of ${D}^{0}\ensuremath{\rightarrow}{K}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ and ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ decays BESIII Collaboration 2015 发表期刊 PHYSICAL REVIEW D 卷号 92期号:7页码:72012 文章类型 Article 摘要 In an analysis of a 2.92 fb(-1) data sample taken at 3.773 GeV with the BESIII detector operated at the BEPCII collider, we measure the absolute decay branching fractions B(D-0 -> K(-)e(+)nu(e)) = (3.505 +/- 0.014 +/- 0.033)% and B(D-0 -> pi(-)e(+)nu(e)) = (0.295 +/- 0.004 +/- 0.003)%. From a study of the differential decay rates we obtain the products of hadronic form factor and the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element f(+)(K)(0)vertical bar V-cs vertical bar = 0.7172 +/- 0.0025 +/- 0.0035 and f(+)(pi)(0)vertical bar V-cd vertical bar = 0.1435 +/- 0.0018 +/- 0.0009. Combining these products with the values of vertical bar V-cs(d)vertical bar from the SM constraint fit, we extract the hadronic form factors f(+)(K)(0) = 0.7368 +/- 0.0026 +/- 0.0036 and f(+)(pi)(0) = 0.6372 +/- 0.0080 +/- 0.0044, and their ratio f(+)(pi)(0)/f(+)(K)(0) = 0.8649 +/- 0.0112 +/- 0.0073. These form factors and their ratio are used to test unquenched lattice QCD calculations of the form factors and a light cone sum rule (LCSR) calculation of their ratio. The measured value of f(+)(K(pi))(0)vertical bar V-cs(d)vertical bar and the lattice QCD value for f(+)(K(pi))(0) are used to extract values of the CKM matrix elements of vertical bar V-cs vertical bar = 0.9601 +/- 0.0033 +/- 0.0047 +/- 0.0239 and vertical bar V-cd vertical bar = 0.2155 +/- 0.0027 +/- 0.0014 +/- 0.0094, where the third errors are due to the uncertainties in lattice QCD calculations of the form factors. Using the LCSR value for f(+)(pi)(0)/f(+)(K)(0), we determine the ratio vertical bar V-cd vertical bar/vertical bar V-cs vertical bar = 0.238 +/- 0.004 +/- 0.002 +/- 0.011, where the third error is from the uncertainty in the LCSR normalization. In addition, we measure form factor parameters for three different theoretical models that describe the weak hadronic charged currents for these two semileptonic decays. All of these measurements are the most precise to date. 学科领域 Astronomy & Astrophysics; Physics DOI 10.1103/PhysRevD.92.072012 收录类别 SCI WOS类目 Astronomy & Astrophysics ; Physics, Particles & Fields WOS记录号 WOS:000363237600002 引用统计 被引频次：18[WOS]   [WOS记录]     [WOS相关记录] 文献类型 期刊论文 条目标识符 http://ir.ihep.ac.cn/handle/311005/229027 专题 实验物理中心 推荐引用方式GB/T 7714 BESIII Collaboration. Study of dynamics of ${D}^{0}\ensuremath{\rightarrow}{K}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ and ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ decays[J]. PHYSICAL REVIEW D,2015,92(7):72012. APA BESIII Collaboration.(2015).Study of dynamics of ${D}^{0}\ensuremath{\rightarrow}{K}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ and ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ decays.PHYSICAL REVIEW D,92(7),72012. MLA BESIII Collaboration."Study of dynamics of ${D}^{0}\ensuremath{\rightarrow}{K}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ and ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{-}{e}^{+}{\ensuremath{\nu}}_{e}$ decays".PHYSICAL REVIEW D 92.7(2015):72012.
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