Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 66: Heavy-Ion Collisions and QCD Phases XIV

HK 66.2: Talk

Thursday, March 31, 2022, 16:15–16:30, HK-H2

Deuteron production in and out of jets measured with ALICE at the LHC — •Chiara Pinto for the ALICE collaboration — Technische Universität München, Garching bei München, Germany

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 √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.