Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Heavy Ion Collision and QCD Phases V
HK 18.5: Vortrag
Dienstag, 15. März 2016, 15:00–15:15, S1/01 A4
Contribution submission to the conference Darmstadt 2016
Measurement of the η meson in Pb-Pb collisions at √sNN=2.76 TeV in the ALICE experiment at LHC — •Lucia Leardini for the ALICE collaboration — Physicalische Institut Heidelberg
Neutral mesons are probes for studying the energy loss of partons traversing the hot and dense medium,
the Quark-Gluon Plasma, that is formed in heavy-ion collisions. Moreover, the study of π0 and
η mesons in Pb-Pb collisions is necessary for the direct-photon measurement as these mesons constitute
its most important background. The η meson production in the transverse momentum range
1 < pT < 20 GeV/c has been measured at midrapidity by the ALICE experiment at the Large Hadron Collider
(LHC) in central and semi-central Pb–Pb collisions at √sNN=2.76 TeV. The low pT part
of the measurement relies on the Photon Conversion Method (PCM), based on the reconstruction of photon conversions by
the Inner Tracking System (ITS) and the Time Projection Chamber (TPC). The ALICE Electromagntic calorimeter (EMCal) provides
the high pT part of the neutral mesons spectra.
The η invariant yields, η/π0 ratio and η RAA will be shown and compared to predictions.