Köln 2025 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 9: Heavy-Ion Collisions and QCD Phases II
HK 9.5: Talk
Monday, March 10, 2025, 17:45–18:00, HS 3 Chemie
Neutral-meson production in pp collisions at √s = 13.6 TeV with the ALICE experiment — •Youssef El Mard Bouziani for the ALICE Germany collaboration — University of Frankfurt, Germany
The ALICE experiment at the LHC aims to explore the properties of the quark-gluon plasma (QGP), a state of matter characterized by extreme densities and temperatures and believed to be created in heavy-ion collisions. High-energy proton-proton (pp) collisions offer a unique environment for understanding related mechanisms within the framework of Quantum Chromodynamics (QCD). Measurements of π0 and η mesons in such collisions deepen our understanding of hadronization processes and provide a baseline for the study of direct photons and dielectrons, which are essential observables in investigating the QGP.
In ALICE, decay photons can be reconstructed through either the energy they deposit in calorimeters or by tracking e+e− pairs resulting from photon conversion within the detector material, known as the Photon Conversion Method (PCM). The calorimeter-based technique provides high statistics and resolution for larger momenta, while PCM offers superior precision for studying neutral mesons at low momenta. To enhance the scope and precision of such investigations, significant upgrades to the detector systems were implemented for LHC Run 3.
In this talk, the current status of the measurements of neutral mesons produced in pp collisions at √s = 13.6 TeV is presented, highlighting particle pT spectra over a broad pT range.