Abstract
The measurement of heavy-flavour (charm and beauty) production in ultra-relativistic heavy-ion collisions provides an important contribution to the study of the properties of the hot and dense medium created in such collisions. One approach to measure heavy-flavour production is via electrons from semi-leptonic decays of heavy-flavour hadrons. In this contribution we present the nuclear modification factor (RAA) and the azimuthal anisotropy (v2) of heavy-flavour decay electrons in Pb-Pb collisions at = 2.76 TeV, which are sensitive to the interaction of c and b quarks with the medium. We also present, for the first time, the azimuthal angular correlations of heavy-flavour decay electrons and charged hadrons, Δϕ(HFE,h), in Pb-Pb collisions and the corresponding near-side yield ratio (IAA).
Highlights
In collisions of lead ions at relativistic energies a high density, strongly interacting QCD medium is produced
The√nuclear modification factor is obtained from the HFE yield measured in Pb-Pb co√llisions at sNN = 2.76 TeV and using the corresponding cross-section from pp collisions at s = 7 TeV to determine the reference for pT < 8 GeV/c [1]
The HFE RAA is consistent with that measured for heavy flavour decay muons at forward rapidity (2.5
Summary
In collisions of lead ions at relativistic energies a high density, strongly interacting QCD medium is produced. The general analysis strategy used for all measurements presented here involves the identification of electrons and the statistical removal of the background from sources other than heavy-flavour hadron decays (Non-HFE ). The√nuclear modification factor is obtained from the HFE yield measured in Pb-Pb co√llisions at sNN = 2.76 TeV and using the corresponding cross-section from pp collisions at s = 7 TeV to determine the reference for pT < 8 GeV/c [1].
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