SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Heavy-Ion Collisions and QCD Phases X

HK 47.2: Talk

Wednesday, March 22, 2023, 17:45–18:00, SCH/A315

Testing coalescence by studying (anti)nuclei production in and out of jets in ALICE — •Chiara Pinto for the ALICE Germany collaboration — Technische Universität München, München, Deutschland

The production mechanism of (anti)nuclei in ultrarelativistic hadronic collisions is under intense debate in the scientific community. The description of the experimental measurements is currently based on two competing phenomenological models: the statistical hadronisation model and the coalescence approach. For the first time, the deuteron production in pp collisions at \sqrt{s}= 13 TeV is measured both in jets and in the underlying event. Due to the collimated emission of nucleons in a jet, the nuclear production by coalescence is expected to be enhanced. In this contribution, the results for the coalescence parameter B2 in and out of the jet are presented in comparison with predictions from the coalescence model and a recently developed reaction-based production mechanism implemented in PYTHIA 8.3.

This work is funded by DFG SFB1258 and by BMBF Verbundforschung (05P21WOCA1 ALICE).