SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 65: Heavy-Ion Collisions and QCD Phases XII

HK 65.2: Talk

Thursday, March 23, 2023, 16:00–16:15, SCH/A216

Measurement of neutral meson production with ALICE — •Nicolas Strangmann for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

The ALICE experiment at CERN-LHC investigates the properties of hot and dense nuclear matter created in heavy-ion collisions. Measurements of identified particle production in pp collisions not only serve as reference for larger collision systems, but also help to study different aspects of hadronisation. This contribution will focus on the production of neutral mesons in different collision systems. A precise determination of the neutral meson production can help constrain theoretical models and provide vital input for direct photon analyses.

In ALICE, different detectors and detector combinations are used to reconstruct neutral mesons (π⁰ and η) via their two photon decay channel. These photons can be detected in the calorimeters or via their conversion-electron tracks in ALICE tracking detectors. ω mesons can be reconstructed via their three pion decay ω→π⁺π⁻π⁰.

In this talk, an overview of the π⁰, η and ω measurements with ALICE will be presented. This includes a multiplicity dependent measurement of π⁰ and η in pp collisions at √s=13 TeV as well as ω measurements in pp and p–Pb collisions.

Supported by BMBF and the Helmholtz Association.