Elliptic flow of heavy-flavour decay electrons in Pb-Pb collisions at = 2.76 TeV with ALICE

Andrea Dubla

doi:10.1088/1742-6596/509/1/012062

Andrea Dubla

Open Access

PDF Available

https://doi.org/10.1088/1742-6596/509/1/012062

Copy DOI

Export

Save

Cite

Abstract
Highlights/Summary
Full-Text PDF
Similar Papers

Abstract

Listen

We present the elliptic ow v2 of electrons from the semi-leptonic decays of heavy-avour hadrons at mid-rapidity for semi-central (20-40% centrality) Pb-Pb collisions at = 2.76 TeV measured with the ALICE detector. A positive v2 is observed at low pT in semi-central collisions. Comparisons with previous measurements obtained at lower collision energy at RHIC in Au-Au collisions at = 0.2 TeV and with theoretical models are also presented.

Highlights

Heavy-quarks, i.e. charm and beauty, are mainly produced in hard scattering processes in the early stages of high energy nucleus-nucleus collisions and they experience the full evolution of the medium formed in such collisions, the Quark-Gluon Plasma (QGP)
Heavy-flavour hadrons are well suited probes to investigate the properties of the medium. Due to their large masses, charm and beauty quarks are expected to lose less energy than light quarks and gluons when traversing the medium due to the dead-cone effect [1] and to have a longer relaxation time [2]. In this contribution we present the measurement of elliptic flow v2 of electrons from the semi-lept√onic decays of heavy-flavour hadrons in semi-central (20-40% centrality) Pb-Pb collisions at sNN = 2.76 TeV with ALICE
Electron identification in the Electro-Magnetic Calorimeter (EMCal) is based on the measurement of the E/p ratio, where E is the energy of the EMCal cluster that was matched to the prolongation of the track with momentum p reconstructed in the TPC and ITS detectors

Summary

Introduction

Heavy-quarks, i.e. charm and beauty, are mainly produced in hard scattering processes in the early stages of high energy nucleus-nucleus collisions and they experience the full evolution of the medium formed in such collisions, the Quark-Gluon Plasma (QGP). In this contribution we present the measurement of elliptic flow v2 of electrons from the semi-lept√onic decays of heavy-flavour hadrons in semi-central (20-40% centrality) Pb-Pb collisions at sNN = 2.76 TeV with ALICE. At low pT, the v2 of the electrons from heavy-flavour hadron decays is sensitive to the degree of thermalization of charm and beauty quarks in the deconfined medium.

Results

Conclusion