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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Heavy-Ion Collisions and QCD Phases XII

HK 56.5: Vortrag

Freitag, 3. April 2020, 12:15–12:30, J-HS F

Measurement of neutral mesons in p-Pb collisions at √s_NN = 5.02 TeV with ALICE — •Andrea Hornung for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

ALICE, the dedicated heavy-ion experiment at the LHC, investigates the properties of the quark-gluon plasma (QGP). In collisions of high-energetic nuclei, energy loss effects have been observed in the production of hadrons at high transverse momenta. To disentangle effects on the particle production caused by the QGP and concurrent initial-state effects, in addition to collisions of heavy nuclei, collisions of protons and nuclei are studied. The measurement of neutral mesons, e.g. π⁰ and η mesons, provides insight into these effects. Furthermore, a precise measurement of neutral mesons is mandatory for the measurement of direct photons. In ALICE, π⁰ and η mesons can be measured via their two-photon decay channel using the ALICE calorimeters PHOS and EMCal or the photon conversion method.

With the new LHC RUN2 data, ALICE has collected eight times more statistics in p-Pb collisions at √s_NN = 5.02 TeV compared to the LHC RUN1 data. In this talk, the status of the analysis of π⁰ and η mesons in the combined data set using the different available detection methods is presented.

Supported by BMBF and the Helmholtz Association.