Figure 1

Example of fits to the US dimuon invariant mass distributions in \PbPb\ collisions at \sqrtsnnE{5.02} in different centrality classes and \pt\ intervals. The left (right) panels show the distributions before (after) background subtraction with the event-mixing technique. Dashed gray curves correspond to background functions, red curves to the signal functions and blue curves to the sum of the signal and background functions.