Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Heavy-Ion Collisions and QCD Phases III
HK 21.4: Vortrag
Dienstag, 12. März 2024, 16:30–16:45, HBR 62: EG 03
Mid-rapidity J/ψ production as a function of multiplicity in p–Pb collisions at √sNN=5.02 TeV with ALICE — •Tabea Eder for the ALICE Germany collaboration — Institut für Kernphysik, Universität Münster
ALICE results from LHC Run 1 data on the charged-particle multiplicity dependence of the inclusive normalized J/ψ production, both at mid-rapidity, indicate a stronger than linear increase for proton-lead collisions at √sNN=5.02 TeV. The corresponding ALICE results on proton-proton collisions at √s = 13 TeV provide a clearer picture of a stronger than linear increase.
This behaviour has been associated with auto-correlation effects in PYTHIA8 studies on proton-proton collisions. Amongst others, this has been achieved by differentiating between different J/ψ production mechanisms for the multiplicity dependent J/ψ production. One of these mechanisms is the weak decay of b-flavoured hadrons, leading to production of non-prompt J/ψ. In data, these can be distinguished by their displaced vertex from prompt J/ψ, which are produced directly in the initial hard collision.
In this talk the multiplicity dependent inclusive J/ψ production is presented for p–Pb collisions at √sNN=5.02 TeV with improved statistics, which is needed to clarify the previous results and is achieved by using ALICE data from LHC Run 2. In addition for the first time a look into the multiplicity dependence of prompt and non-prompt J/ψ production in p–Pb collisions at ALICE is presented.