Speaker
Ana Marin
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Description
The ALICE experiment at LHC performs measurements of neutral meson
inclusive spectra in mid-rapidity
in a wide $p_{\rm T}$ range in pp,
p-Pb and Pb-Pb collisions, as well as correlations between
leading
$\pi^0$ and charged hadrons. Neutral mesons $\pi^0$, $\eta$, $\omega$
are reconstructed via
complementary methods, using the ALICE
electromagnetic calorimeters and by the central tracking
system
identifying photons converted to $e^+e^-$ pairs in the material of the
inner barrel detectors.
Measurements of neutral meson spectra in pp
collisions at energies $\sqrt{s}$ = 0.9, 2.76, 7 TeV provide
valuable
data for pQCD calculations and allow to study scaling properties of
hadron production at the
LHC energies. The study of neutral meson
production in p-Pb collisions at $\sqrt{s} = 5.02$ TeV is of
importance
to confirm that the strong suppresion observed in central Pb-Pb
collisions is a final-state
effect of the produced dense medium.
The
nuclear modification factor $R_{\rm AA}$ of the $\pi^0$ production in
Pb-Pb collisions at
$\sqrt{s_{\rm NN}}$ = 2.76 TeV at different
collision centralities shows a clear pattern of strong
suppression in
a hot QCD medium with respect to pp collisions. We shall also present
the current status
of correlation measurements between $\pi^0$ or
isolated photons triggered by the electromagnetic calorimeter
EMCAL,
and charged hadrons detected in the central tracker.
| On behalf of collaboration: | ALICE |
|---|
Primary author
Ana Marin
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
