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arXiv 0712.1664hep-ex
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$D^+$和$D^0$介子包含$K^\pm$和包含半轻子衰变分支分数的直接测量

Direct Measurements of the Branching Fractions for Inclusive $K^\pm$ and Inclusive Semileptonic Decays of $D^+$ and $D^0$ Mesons

BES Collaboration

备注：
6 pages, 5 figures
发表信息：
Phys.Lett.B658:1-6,2007
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摘要：

利用BEPC对撞机BESII探测器在3.773 GeV附近收集的单标记$\bar D$样品，我们测量了$D^+$和$D^0$介子的包含性$K^\pm$衰变的分支分数，它们分别是$BF(D^+\to K^-X) = (24.7 \pm 1.3 \pm 1.2)%$，$BF(D^+\to K^+X) = (6.1 \pm 0.9 \pm 0.4) %$，$BF(D^0\to K^-X) = (57.8 \pm 1.6 \pm 3.2) %$和$BF(D^0\to K^+X) = (3.5 \pm 0.7 \pm 0.3) %$.我们还测量了$D^+$和$D^0$介子包容性半轻子衰变的分支分数为$BF(D^+ \to e^+ X)=(15.2 \pm 0.9 \pm 0.8)%$和$BF(D^0 \to e^+ X) =(6.3 \pm 0.7 \pm 0.4) %$。这些产生它们的部分宽度的比率为$Γ(D^+ \to e^+X)/Γ(D^0 \to e^+X)=0.95 \pm 0.12 \pm 0.07$。

英文摘要：

With singly-tagged $\bar D$ samples selected from the data collected at and around 3.773 GeV with the BESII detector at the BEPC collider, we have measured the branching fractions for the inclusive $K^\pm$ decays of $D^+$ and $D^0$ mesons, which are $BF(D^+\to K^-X) = (24.7 \pm 1.3 \pm 1.2)%$, $BF(D^+\to K^+X) = (6.1 \pm 0.9 \pm 0.4) %$, $BF(D^0\to K^-X) = (57.8 \pm 1.6 \pm 3.2) %$ and $BF(D^0\to K^+X) = (3.5 \pm 0.7 \pm 0.3) %$, respectively. We have also measured the branching fractions for the inclusive semileptonic decays of $D^+$ and $D^0$ mesons to be $BF(D^+ \to e^+ X)=(15.2 \pm 0.9 \pm 0.8)%$ and $BF(D^0 \to e^+ X) =(6.3 \pm 0.7 \pm 0.4) %$. These yield the ratio of their partial widths to be $Γ(D^+ \to e^+X)/Γ(D^0 \to e^+X)=0.95 \pm 0.12 \pm 0.07$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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