. Reconstruction efficiency of dielectrons as a function of the invariant mass for different $p_{\mathrm{T}, \mathrm{ee}}$ intervals. The statistical uncertainties are represented by the vertical bars. Only results for the negative magnetic field polarity are shown, with similar values obtained for the positive magnetic field configuration. | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/4474/PairEfficiency-93479.png ) |