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arXiv 0910.0296hep-ex
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D^{+}和D_{s} ^{+}在Belle的衰变特性研究

Study of D^{+} and D_{s}^{+} Decay Properties at Belle

The Belle Collaboration, S. Lee, B. R. Ko, E. Won

备注：
To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726
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摘要：

我们报告的双重Cabibbo抑制衰变，$D^{+}_{s} \to K^{+}K^{+}π^{-}$的第一次观察和显着改善测量的双重Cabibbo抑制衰变，$D^{+} \to K^{+}π^{+}π^{-}$使用$\textrm{605 fb}^{-1}$收集的数据与贝尔探测器在KEKB非对称能量$e^{+}e^{-}$对撞机。分支比相对于其Cabibbo青睐的对应物是$\mathcal{B}(D^{+}_{s} \to K^{+}K^{+}π^{-})/\mathcal{B}(D^{+}_{s} \to K^{+}K^{-}π^{+}) = 0.229\pm0.028\pm0.012)%$和$\mathcal{B}(D^{+} \to K^{+}π^{+}π^{-})/\mathcal{B}(D^{+} \to K^{-}π^{+}π^{+}) = (0.569\pm0.018\pm0.014)%$，其中第一个不确定性是统计的，第二个是系统的。我们还报告了改进的测量$D^{+} \to K^{0}_{S}K^{+}$和$D^{+}_{s} \to K^{0}_{S}π^{+}$分支比使用相同数量的数据样本。相对于Cabibbo有利模式的测量的分支比是$\mathcal{B}(D^{+} \to K^{0}_{S}K^{+})/\mathcal{B}(D^{+} \to K^{0}_{S}π^{+}) = (0.1899\pm0.0011\pm0.0018)$和$\mathcal{B}(D^{+}_{s} \to K^{0}_{S}π^{+})/\mathcal{B}(D^{+}_{s} \to K^{0}_{S}K^{+}) = (0.0803\pm0.0024\pm0.0012)$。

英文摘要：

We report the first observation of the doubly Cabibbo-suppressed decay, $D^{+}_{s} \to K^{+}K^{+}π^{-}$ and the significantly improved measurement of the doubly Cabibbo-suppressed decay, $D^{+} \to K^{+}π^{+}π^{-}$ using $\textrm{605 fb}^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The branching ratio with respect to its Cabibbo-favored counterpart are $\mathcal{B}(D^{+}_{s} \to K^{+}K^{+}π^{-})/\mathcal{B}(D^{+}_{s} \to K^{+}K^{-}π^{+}) = 0.229\pm0.028\pm0.012)%$ and $\mathcal{B}(D^{+} \to K^{+}π^{+}π^{-})/\mathcal{B}(D^{+} \to K^{-}π^{+}π^{+}) = (0.569\pm0.018\pm0.014)%$, where the first uncertainties are statistical and the second is systematic. We also report the improved measurement of $D^{+} \to K^{0}_{S}K^{+}$ and $D^{+}_{s} \to K^{0}_{S}π^{+}$ branching ratios using the same amount of data samples. The measured branching ratios with respect to the Cabibbo-favored modes are $\mathcal{B}(D^{+} \to K^{0}_{S}K^{+})/\mathcal{B}(D^{+} \to K^{0}_{S}π^{+}) = (0.1899\pm0.0011\pm0.0018)$ and $\mathcal{B}(D^{+}_{s} \to K^{0}_{S}π^{+})/\mathcal{B}(D^{+}_{s} \to K^{0}_{S}K^{+}) = (0.0803\pm0.0024\pm0.0012)$.

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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