Left: The $M_{\mu\mu}$ distribution in the 5--60\ extended Crystal Ball function for the signal and a Variable-Width Gaussian function for the background. Right: The $v_2(M_{\mu\mu})$ distribution in the same centrality and $p_{\rm T}$ intervals fitted with the function from Eq. (\ref{eq:v2_sb}). | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/5452/Fig1_01072019-97409.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/5452/Fig2_01072019-97411.png ) |