# Figure 3

 Example invariant mass spectra in selected \pT slices in PCM (top left), PCM-EMCal (top right) and EMCal (bottom plots) in the $\eta$ mass region The black histograms show invariant mass distributions before any background subtraction The grey points show mixed event and residual correlated background contributions, which have been subtracted from raw real events to obtain the signal displayed with red data points The blue curves represent fits to the background subtracted invariant mass spectra.