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- W2312458584 abstract "Using the CLEO II detector at CESR, we observe 500 $Lambda l^+$ pairs consistent with the semileptonic decay $Lambda_c to Lambda l^+ nu_{l}$. We measure $sigma (e^+ e^- to Lambda_c X) dot {cal B}(Lambda_c^+ to Lambda l nu_{l}) =4.77 pm 0.25 pm 0.66 $pb. Combining with the charm semileptonic width and the lifetime of the $Lambda_c$, we also obtain ${cal B}(Lambda_c to p K^- pi^+)$. We find no evidence for $Lambda l^+ nu_{l}$ final states in which there are additional $Lambda_c^+$ decay products. We measure the decay asymmetry parameter of $Lambda_c to Lambda l^+ nu_{l}$ to be $alpha_{Lambda_c} =-0.89pm{^{0.17}_{0.11}}pm{^{0.09}_{0.06}}." @default.
- W2312458584 created "2016-06-24" @default.
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