Speaker
Daicui Zhou
(Institute of Particle Physics - Hua-Zhong Normal University)
Description
The LHC heavy-ion physics program aims at investigating the properties of strongly-
interacting matter in extreme conditions of temperature and energy density, where the
formation of the Quark Gluon Plasma (QGP) is expected. Azimuthal angluar correlations
between two particles provide a powerful tool to study medium-induced parton energy
loss and jet modification in heavy-ion collisions. Neutral mesons production at high-pT
is modified in Pb-Pb collisions due to the parton energy loss mechanism. Jet in trigger
meson direction and opposite jet in azimuth are also quenched in the medium. Therefore,
the charged particles yield associated with the high-pT neutral meson is modfied in Pb-Pb
collisions compared to the pp reference at the same colliding energy.
ALICE, the only detector designed and optimized for heavy-ion physics at the LHC,
measures the azimuthal angular correlations between neutral pions measured through the
ElectroMagnetic Calorimeter (EMCAL) located at central rapidity(-0.7 < y < 0.7) and
charged hadrons detected in the central tracking system. Azimuthal angular correlation
distributions and jet yield modification measured by the ¼0-hadron correlations in pp and
Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV will be presented in the talk.
Author
Daicui Zhou
(Institute of Particle Physics - Hua-Zhong Normal University)
