Fig. 7.

Fits to nonresonant background using lowest-order unbiased functions to describe the three-body invariant mass $m_{\mu \mu \gamma }$ distributions observed in data for the $\mathrm{Z}\to \mathrm{J}/\psi \gamma$ channel in the EB high $R_9$ category (top left), the EB low $R_9$ category (top right), the EE category (bottom left), as well as the $\mathrm{H}\to \mathrm{J}/\psi \gamma$ channel (bottom right)