Speaker
Denise Aparecida Moreira De Godoy
(Laboratoire de Physique Subatomique et des Technologies Associe)
Description
In heavy-ion collisions at ultrarelativistic energies a sufficiently high temperature can be reached to form the Quark-Gluon Plasma (QGP), a deconfined state of strongly-interacting matter. Heavy quarks, i.e. charm and beauty, serve as a sensitive probe of the QGP properties since they are predominantly produced in initial hard scattering processes and interact with the hot and dense medium.
The elliptic azimuthal anisotropy ($v_2$) of electrons from heavy-flavour hadron decays in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV, measured by the ALICE collaboration, has been used to probe the properties of the QGP. The measurement of $v_2$ of heavy-flavour decay electrons at low transverse momentum tests whether heavy quarks take part in the collective expansion of the deconfined medium. In addition, the measurement of $v_2$ of heavy-flavour decay electrons at high transverse momentum carries information on the path-length dependence of the heavy-quark energy loss within the QGP.
We present a way to subtract the contribution of the charm decay electron $v_2$ from the heavy-flavour decay electron $v_2$.
The resulting $v_2$ of electrons from beauty-hadron decays is derived from the elliptic azimuthal anisotropy of heavy-flavour decay electrons and prompt D mesons measured in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV. In the near future, the significant increase of the luminosity at the LHC, as well as the ALICE detector upgrades, will increase the potential of this analysis.
| On behalf of collaboration: | ALICE |
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Author
Denise Aparecida Moreira De Godoy
(Laboratoire de Physique Subatomique et des Technologies Associe)
