Search for the semi-leptonic decays ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_e$ and ${\Lambda }_c^{+}\to p{K}_S^0{\pi }^{-}{e}^{+}{\nu }_e$

BESIII Collaboration, M. Ablikim, M. N. Achasov +595

We search for the semi-leptonic decays ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_e$ and ${\Lambda }_c^{+}\to p{K}_S^0{\pi }^{-}{e}^{+}{\nu }_e$ in a sample of 4.5 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data coll…