Figure 1

Related paper
Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb-Pb collisions at $\mathbf{\sqrt{s_\mathrm{NN}}}$ = 2.76 TeV
$n_{\sigma}^{\rm{TPC}}$ distributions as a function of momentum in semi-central (20-40%) Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. Upper left panel: no ITS or TOF electron identification is applied. Upper right panel: the TOF-PID (see text) is applied. Lower panel: the TOF and ITS-PID (see text) are both applied.
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