Measurement of the production of high-<i>p</i><sub>T</sub> electrons from heavy-flavour hadron decays in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=2.76 TeV



Adam, J, Adamova, D, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Aiola, S
et al (show 997 more authors) (2017) Measurement of the production of high-<i>p</i><sub>T</sub> electrons from heavy-flavour hadron decays in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=2.76 TeV. PHYSICS LETTERS B, 771. pp. 467-481.

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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 sNN=2.76 TeV. The transverse momentum (pT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor RAA in the interval 3&lt;pT&lt;18 GeV/c. The RAA 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 pT interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 21 Jun 2017 12:57
Last Modified: 20 Jun 2024 19:03
DOI: 10.1016/j.physletb.2017.05.060
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3008088