First measurements of the absolute branching fraction of ${\Lambda }_c(2625{)}^{+}\to {\Lambda }_c^{+}{\pi }^{+}{\pi }^{-}$ and upper limit on ${\Lambda }_c(2595{)}^{+}\to {\Lambda }_c^{+}{\pi }^{+}{\pi }^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +613

The absolute branching fraction of the decay ${\Lambda }_c(2625{)}^{+}\to {\Lambda }_c^{+}{\pi }^{+}{\pi }^{-}$ is measured for the first time to be $(50.7\pm 5.0_{stat.}\pm 4.9_{syst.})\%$ with 36…