Observation of the decay $X(3872)\to {\pi }^0{\chi }_{c1}(1P)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +468

Using a total of $9.0{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data with center-of-mass energies between 4.15 and 4.30 GeV collected by the BESIII detector, we search for the proces…