Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Heavy-Ion Collisions and QCD Phases I
HK 8.1: Gruppenbericht
Montag, 11. März 2024, 16:45–17:15, HBR 62: EG 03
Probing hadronisation effects with heavy-flavour particles with ALICE at the LHC — •Jeremy Wilkinson for the ALICE Germany collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Deutschland
The study of heavy-quark (charm and beauty) hadronisation has recently become a major topic of interest at the CERN LHC. Typically, the fragmentation functions that describe the evolution from a bare heavy quark to a bound hadronic state were assumed to apply universally. However, measurements of the relative production rates of charm baryons and mesons at the LHC have challenged this assumption, indicating that the hadronisation of heavy-flavour quarks in collider experiments is dependent on the collision system.
In this contribution, the most recent results from the ALICE Collaboration on the hadronisation of heavy-flavour particles at the LHC will be presented. Measurements of prompt and non-prompt Λc+-baryon production in pp and p–Pb collisions are used to investigate the hadronisation of charm and beauty baryons. The production of the Ξc0 baryon was measured in p–Pb collisions at midrapidity for the first time. The available measurements of prompt ground-state charm hadrons in p–Pb collisions were combined to compute the charm fragmentation fractions and total charm cross section at midrapidity. Recent measurements of Ωc0 production in semileptonic decays are presented along with the determination of its relative branching fractions. Finally, a brief overview of the current status of heavy-flavour measurements using data from Run 3 of the LHC is presented.
Keywords: heavy flavour; hadronisation; open charm