20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Heavy flavour measurements in Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$~TeV with the ALICE experiment

21 Jul 2011, 17:15
15m
Lesdiguières (Alpes Congrès - Alpexpo)

Lesdiguières

Alpes Congrès - Alpexpo

Parallel session talk Ultrarelativistic Heavy Ions

Speaker

Dr Diego Stocco (Subatech)

Description

The ALICE experiment studies the properties of the QCD matter at the extreme energy densities of the ultra-relativistic heavy-ion collisions at the LHC. Produced on a very short time-scale in the initial hard-scattering processes, the heavy quarks (charm and beauty) experience the whole collision evolution: measuring the open heavy flavour spectra allows to investigate the mechanisms of energy-loss and hadronization in the hot and dense medium formed in the nucleus-nucleus collision. In particular, the ALICE capability to disentangle charm and beauty production is expected to help investigating the predicted quark-mass dependence of the in-medium energy-loss. The ALICE detector measures heavy-flavours in the semi-electroinc and semi-muonic decay channels at mid- and forward rapidity, respectively, and D mesons at mid-rapidity. The results in lead-lead collisions at $\sqrt{s_{NN}} = 2.76$~TeV and proton-proton collisions at $\sqrt{s} = 7$~TeV will be presented. The nuclear modification factor $R_{AA}$, defined as the ratio between the heavy-flavour production in nucleus-nucleus and proton-proton collisions rescaled to the number of binary collisions of nucleons in nuclei, will be discussed. The central to peripheral nuclear modification factor $R_{CP}$, obtained from the comparison of the measurements in heavy-ion collisions with a small and large impact parameter, respectively, will be presented as well.

Primary author

Dr Diego Stocco (Subatech)

Presentation Materials