SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Heavy-Ion Collisions and QCD Phases IV

HK 17.4: Talk

Tuesday, March 21, 2023, 18:00–18:15, SCH/A315

Studies on J/ψ production as a function of the charged-particle multiplicity in pp collisions at the LHC — •Ailec de la Caridad Bell Hechavarria for the ALICE Germany collaboration — Institut für Kernphysik, Westfälische Wilhelms- Universität Münster

The inclusive J/ψ yields as a function of the charged-particle multiplicity exhibit a stronger than linear increase when the J/ψ is measured at midrapidity (|y|<0.9) than when it is measured at forward rapidity (2.5 <|y|< 4). Insight into this effect could be gained by using the J/ψ as a leading particle and studying the associated underlying events in the collision.

Data collected in pp collisions with ALICE at the LHC during Run 2 is used to investigate the relative J/ψ yield, measured at mid-rapidity (|y|<0.9) in its dielectron decay channel and as a function of the charged-particle multiplicity, in various regions of the azimuthal angle with respect to the emission of the J/ψ meson. This contribution will show these measurements in pp collisions at √s=13 TeV.

*Supported by DFG under GRK2149