Speaker
Sona Pochybova
(Hungarian Academy of Sciences (HU))
Description
The ALICE detector is dedicated to studying the properties of hot and dense matter created in heavy-ion collissions. Amongst the probes used to investigate these properties are high-momentum particles, which originate in hard-scatterings occuring before the fireball creation. The traversing fragments of hard scatterings interact with the hot and dense matter and via this interaction their spectra and azimuthal distribution are modified. This is probed by the measurement of nuclear modification factor, where the p_{T} spectra obtained in Pb--Pb collisions are compared to a pp baseline. A strong suppresion of charged hadrons as well as neutral- and heavy-mesons was observed at p_{T} > 4 GeV/c. Azimuthal correlations, using the high-momentum hadrons as triggers, can provide further insight into how the presence of medium modifies the final particle production and from the comparison with theoretical models can test their predictions of its properties.
We give an overview of ALICE azimuthal-correlation measurements of neutral- and heavy-meson triggers with charged hadrons in pp at \sqrt_{s_{NN}}=7 TeV and Pb--Pb at \sqrt_{s_{NN}}=2.76 TeV. We also present a measurement of \pi_{0} correlation with jets in pp at \sqrt_{s_{NN}}=7 TeV.
Author
Sona Pochybova
(Hungarian Academy of Sciences (HU))