Improved measurement of the branching fraction of $h_c\to \gamma {\eta }^{\prime }/\eta$ and search for $h_c\to \gamma {\pi }^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

The processes $h_c\to \gamma P(P={\eta }^{\prime },\eta ,{\pi }^0)$ are studied with a sample of $(27.12\pm 0.14)\times 10^8$ $\psi (3686)$ events collected by the BESIII detector at the BEPCII collider. T…