# Figure 57

 $n_{\sigma^\mathrm{TPC}_\mathrm{e}}$ as a function of momentum for Pb--p collisions at \mbox{\sqrtsnn = 5.02 TeV} recorded with the electron trigger (\pt threshold at 3\gevc) Electrons from photon conversions in the detector material were rejected bymatching the online track with a track in the TPC