Measurement of exclusive Lambda c decays with a Sigma + in the final state.
Measurement of exclusive Lambda c decays with a Sigma + in the final state.
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DOI：
10.1103/physrevlett.71.3255
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发表时间：
1993-11
影响因子：
8.6
通讯作者：
R. Ammar;S. Ball;P. Baringer;D. Coppage;N. Copty;R. Davis;N. Hancock;M. Kelly;N. Kwak;H. Lam
中科院分区：
文献类型：
--
作者：
R. Ammar;S. Ball;P. Baringer;D. Coppage;N. Copty;R. Davis;N. Hancock;M. Kelly;N. Kwak;H. Lam
我们已经测量了三个Λ c衰变模式的分支比，这些模式在终态中具有π +。其中两种衰变模式，λ c → π + π 0和λ c + → π + ω，没有外部W辐射振幅。与pK - π +模式相关的分支比分别为0.20±0.03±0.03和0.54±0.13±0.06。我们还显著地改进了先前观察到的衰变模式Λ c + → π + π -的分支比的测量。我们发现它的分支比相对于pK - π +为0.74±0.07±0.09
We have measured branching ratios for three Λ c decay modes that have a Σ + in the final state. Two of the observed decay modes, λ c →Σ + π 0 and λ c + →Σ + ω, have no external W-emission amplitudes. Their branching ratios relatives to the pK - π + mode are 0.20±0.03±0.03 and 0.54±0.13±0.06, respectively. We have also significantly improved the measurement of the branching ratio for the previously observed decay mode Λ c + →Σ + π + π - . We find its branching ratio relative to pK - π + to be 0.74±0.07±0.09