Related paper Measurement of dielectron production in central Pb-Pb collisions at $\sqrt{\textit{s}_{\mathrm{NN}}}$ = 2.76 TeV . (A) Invariant-mass distributions of unlike-sign (black), like-sign (red) and signal (blue) dielectron pairs. (B) Acceptance correction factor ($R$-factor) for both magnetic field orientations. Only statistical uncertainties are shown. [png] [pdf] [eps][png] [pdf] [eps]