Speaker
Denise Aparecida Moreira De Godoy
(Universidade de Sao Paulo (BR))
Description
Heavy quarks, charm and bottom, are produced in early stages of heavy-ion collisions. Propagating through the created matter they serve as a probe of the dynamics of the strongly-interacting, hot and dense plasma of quarks and gluons (QGP).
The transverse momentum dependence of the elliptic flow (v2) of heavy quarks is sensitive to the properties of the QGP.
A non-zero v2 of low transverse momentum electrons from semi-leptonic decays of heavy flavours indicates a collective motion of the heavy quarks with respect to the bulk of the created matter. Whereas, the high transverse momentum v2 is sensitive to the path length dependence of heavy-quark energy loss within the QGP.
We present measurements of heavy-flavour electron v2 in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV by the ALICE experiment at mid-rapidity. In 2011, the Electromagnetic Calorimeter (EMCal) provided a dedicated online trigger for measurements of high momentum electrons in Pb-Pb collisions. The electrons were identified in these triggered events using the Time Projection Chamber (TPC) and the Electromagnetic Calorimeter (EMCal). The heavy-flavour electron v2 will be shown as a function of the transverse momentum of the decay electrons.
Author
Collaboration ALICE
(CERN, Geneva, Switzerland)
Co-author
Denise Aparecida Moreira De Godoy
(Universidade de Sao Paulo (BR))
