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Electrons from heavy-flavour hadron decays (charm and beauty) were measuredwith the ALICE detector in Pb-Pb collisions at a centre-of-mass of energy$\sqrt{s_{\rm NN}}=2.76$ TeV. The transverse momentum ($p_{\rm T}$)differential production yields at mid-rapidity were used to calculate thenuclear modification factor $R_{\rm AA}$ in the interval $3<p_{\rm T}< 18$GeV/$c$. The $R_{\rm AA}$ shows a strong suppression compared to binary scalingof pp collisions at the same energy (up to a factor of 4) in the 10% mostcentral Pb-Pb collisions. There is a centrality trend of suppression, and aweaker suppression (down to a factor of 2) in semi-peripheral (50-80%)collisions is observed. The suppression of electrons in this broad $p_{\rm T}$interval indicates that both charm and beauty quarks lose energy when theytraverse the hot medium formed in Pb-Pb collisions at LHC.

Measurement of the production of high-$p_{\rm T}$ electrons from heavy-flavour hadron decays in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV