Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{\psi }_2(3823)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +566

Using a data sample corresponding to an integrated luminosity of 11.3 $\mathrm{f}{\mathrm{b}}^{-1}$ collected at center-of-mass energies from $4.23$ to $4.70$~GeV with the BESIII detector, we obse…