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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 24: Heavy-Ion Collisions and QCD Phases V

HK 24.4: Talk

Tuesday, March 29, 2022, 17:00–17:15, HK-H1

J/ψ production as a function of the event multiplicity in p-Pb collisions at the LHC — •Tabea Eder for the ALICE collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster

Previous ALICE results indicate a stronger than linear increase of the inclusive normalized J/ψ yield with charged-particle multiplicity, both measured at mid-rapidity, in 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.
In PYTHIA8, this behavior has been associated with auto-correlation effects in proton-proton collisions. This has been achieved by investigating the multiplicity dependence of J/ψ production in different regions of the azimuthal angle, which is the difference between the J/ψ meson and the charged particle emission angle. For proton-lead collisions, no results on these distributions for the J/ψ meson are available yet.
In this talk first results on the multiplicity dependence of the normalized J/ψ yield for proton-lead collision in regions of the azimuthal angle will be presented, using ALICE data at √sNN=5.02 TeV recorded during the LHC data taking Run 2 in 2016.
Supported by BMBF within the ErUM Program.

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