Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV
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M. B. and Zinovjev, G. and Zmeskal, J. and ALICE Collaboration... Show more Show less
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Abstract
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 root s(NN) = 2.76 TeV. The transverse momentum (pT)
differential production yields at mid-rapidity were used to calculate
the nuclear modification factor R-AA in the interval 3 < p(T) < 18
GeV/c. The R-AA 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 coollisions. 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 p(T) interval indicates that both charm and beauty quarks lose
energy when they traverse the hot medium formed in Pb-Pb collisions at
LHC. (C) 2017 The Author. Published by Elsevier B.V.... Show more Show less