First observation of ${\Lambda }_c(2595{)}^{+}\to {\Lambda }_c^{+}{\pi }^0{\pi }^0$ and ${\Lambda }_c(2625{)}^{+}\to {\Lambda }_c^{+}{\pi }^0{\pi }^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +658

By analysing $e^{+}{e}^{-}$ annihilation data corresponding to an integrated luminosity of 368.48~pb${}^{-1}$ collected at the centre-of-mass energies of $\sqrt{s}=4.918$ and $4.951$~GeV…