Determination of the $CP$-even fraction of $D^0\to K_S^0{\pi }^{+}{\pi }^{-}{\pi }^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +608

Quantum-correlated $D\bar{D}$ pairs collected by the BESIII experiment at the $\psi (3770)$ resonance, corresponding to an integrated luminosity of 2.93 fb${}^{-1}$, are used to study th…