Journal Article Measurement of the production of high-pT electrons from heavy-flavour hadron decays in Pb–Pb collisions at √sNN=2.76TeV 

ALICE Collaboration  ,  Busch, O.  ,  Chujo, T.  ,  Esumi, S.  ,  Miake, Y.

771pp.467 - 481 , 2017-08 , Elsevier
Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy View the MathML sourcesNN=2.76 TeV. The transverse momentum (pTpT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor RAARAA in the interval 3<pT<183<pT<18 GeV/c . The RAARAA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad pTpT interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

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