Measurement of the production of high- electrons from heavy-flavour hadron decays in Pb-Pb collisions at = 2.76 TeV

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 TeV. The transverse momentum () differential production yields at mid-rapidity were used to calculate the nuclear modification factor in the interval GeV/. The 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 interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb-Pb collisions at LHC.

Año de publicación:

2016

Keywords:

Fuente:

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