Study of the Decay $Λ_c \to Λl^+ ν_{l}

The CLEO Collaboration

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 $σ(e^+ e^- \to Λ_c X) \dot {cal B}(Λ_c^+ \to…