Study of light scalar mesons through $D_s^{+}\to \ddot{I}{€}^0\ddot{I}{€}^0{e}^{+}\hat{I}{½}_e$ and $K_S^0{K}_S^0{e}^{+}\hat{I}{½}_e$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +498

Using 6.32~fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data recorded by the BESIII detector at center-of-mass energies between $4.178$ to $4.226$ GeV, we present the first measurement of the d…