Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Schwerionenkollisionen und QCD Phasen

HK 62.4: Vortrag

Donnerstag, 7. März 2013, 15:00–15:15, HSZ-201

Elliptic Flow Measurement of Heavy Flavour Decay Electrons in Pb-Pb Collisions at $\sqrt{s}$ 2.76TeV with ALICE — •Theodor Rascanu — Institut fuer Kernphysik Frankfurt, Deutschanld

In heavy-ion collisions, charm and beauty quarks are produced in the initial hard scattering processes. They then propagate and interact strongly with the created medium, the Quark Gluon Plasma (QGP), and thus allow to probe its properties. One way to measure heavy-quarks is via electrons from the semileptonic decays of open charm and beauty hadrons. At low transverse momentum, the level of thermalization of heavy quarks can be studied via the azimuthal anisotropy of the heavy flavour electron emission in the transverse plane, the elliptic flow, v_{2}. At high pt, v_{2} provides insight on the path length dependence of parton energy-loss. In this talk we present v_{2} measurements of electrons from heavy flavour decays at mid rapidity with ALICE in semi-central (20-40%) Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV. The electrons are identified using the Time Of Flight detector and Time Projection Chamber at low momenta, as well as the Electromagnetic Calorimeter at higher momenta. The latter provides in addition the possibility to trigger on electrons in the collision. We report on the electron identification and explain how the non-heavy flavour electron background is subtracted. Finally the results are compared to different theoretical models.