The $M_{\mu\mu}$ distribution in low (top panels), intermediate (middle panels) and high (bottom panels) $p_{\rm T}$ intervals for central (left panels) and semi-central (right panels) collisions. The data are fitted to a combination of an extended Crystal Ball (CB2) function for the signal and a Variable-Width Gaussian (VWG) function for the background. The distributions are compared to the ones obtained with the event-mixing technique (see text for details). Only statistical uncertainties are shown. | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_0_1_0_1-93527.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_0_1_2_9-93529.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_2_4_0_1-93531.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_2_4_2_9-93533.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_5_6_0_1-93535.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4759/fig1_m_5_6_2_9-93537.png ) |