SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 66: Heavy-Ion Collisions and QCD Phases XIII
HK 66.1: Vortrag
Donnerstag, 23. März 2023, 15:45–16:00, SCH/A315
Measurement of light neutral meson production inside jets in pp collisions at √s = 13 TeV with ALICE — •Joshua König for the ALICE Germany collaboration — IKF, Goethe-Universität Frankfurt
Particle production in ultra-relativistic pp collisions can be factorized into the parton density function (PDF), the partonic cross-section and the fragmentation function (FF). While PDFs, accessible via deep inelastic scattering experiments, and the partonic cross section, calculable using perturbative QCD, are independent of the final state particle species, FFs need to be constrained by experimental data for each particle species. Measurements of the momentum fraction z = ppart/pjet of a particle species contained in a high energetic jet gives direct access to the FF of the species.
In this talk, the measurement of the pT spectra of π0 and η mesons inside jets as well as the measurement of the meson momentum fraction z in pp collisions at √s = 13 TeV with ALICE will be presented. The measurement combines results from several partial independent meson reconstruction techniques available in ALICE, including calorimeter based photon detection as well as utilizing photon conversions in the central tracking detectors. Particle jets are reconstructed using charged tracks from the central tracking detectors as well as neutral clusters from the electromagnetic calorimeter.
The results will be compared to theoretical model predictions.
Supported by BMBF and the Helmholtz Association