Branching fraction measurements of $\psi (3686)\to \gamma {\chi }_{cJ}$

BESIII collaboration, M. Ablikim, M. N. Achasov +428

Using a sample of 106 million $\psi (3686)$ decays, the branching fractions of $\psi (3686)\to \gamma {\chi }_{c0},\psi (3686)\to \gamma {\chi }_{c1}$, and $\psi (3686)\to \gamma {\chi }_{c2}$ are measured with improved precisio…