Speaker
Cristiane Jahnke
(Universidade de Sao Paulo (BR))
Description
Measurements of heavy-flavour (charm and beauty) production in high-energy heavy-ion collisions allows us to study the Quark-Gluon
Plasma (QGP). The QGP is a high energy-density state of strongly-interacting
matter in which partons are deconfined. Due to their large masses, heavy
quarks are produced in the early stages of the collision and experience the
whole evolution of the system. The ALICE collaboration has measured
electrons from heavy-flavour hadron decays in Pb--Pb collisions at
$\sqrt{s_{\rm NN}}$ = 2.76 TeV at mid-rapidity. A strong suppression of the yield of heavy-flavour decay electrons in the transverse momentum interval $3 < p_{\rm T} < 18~\textrm{GeV}/c$ is observed in the 0-10 $\%$ most central collisions, when compared to binary-scaled pp measurements. Measurements of heavy-flavour decay electrons in the same $p_{\rm T}$ range in p--Pb collisions
are crucial to disentangle cold nuclear matter effects from hot nuclear matter effects in Pb--Pb collisions. The production of electrons from heavy-flavour hadron decays has been measured with ALICE in minimum-bias p--Pb collisions at $\sqrt{s_{\rm NN}}$=5.02 TeV in the interval $0.5 < p_{\rm T} < 12~\textrm{GeV}/c$. The ElectroMagnetic Calorimeter (EMCal) together with the Time Projection Chamber (TPC) are used to identify electrons at high $p_{\rm T}$.
In addition, during the p--Pb run the EMCal provided a trigger for hard probes such as high-$p_{\rm T}$ electrons and photons.
This allows to measure electrons up to a $p_{\rm T}$ of about 18 $\textrm{GeV}/c$.
We will present the heavy-flavour decay electron measurement in minimum-bias p--Pb collisions at 5.02 TeV using the TPC and EMCal and show some results from the EMCal triggered data.
| On behalf of collaboration: | ALICE |
|---|
Author
Cristiane Jahnke
(Universidade de Sao Paulo (BR))
