QM 2022

J/$\psi$ production as a function of the charged-particle multiplicity by regions of azimuth angle in pp collisions at $\sqrt{s}$=13 TeV measured with ALICE

6 Apr 2022, 17:46

4m

Poster QGP in small and medium systems Poster Session 1 T05_1

Speaker

Ailec Bell Hechavarria (Westfaelische Wilhelms-Universitaet Muenster (DE))

Description

Previous ALICE publications have shown, in pp collisions at the LHC, an increase of the inclusive J/$\psi$ yields as a function of charged-particle multiplicity. Such an increase was found to be stronger than linear, and both J/$\psi$ and multiplicity were measured at midrapidity. The causes for this behavior have been investigated in previous studies with PYTHIA8 and attributed to possible auto-correlation effects. Insight on this effect could be gained by measuring the charged-particle multiplicity in three azimuth regions relative to the direction of the J/$\psi$.

Data collected with ALICE at the LHC during Run 2 is used to investigate the relative J/$\psi$ yield, measured at mid-rapidity (|y|<0.9) in its di-electron 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/$\psi$ meson.

In this contribution, new measurements of this correlation performed in pp collisions at $\sqrt{s}$=13 TeV TeV will be shown.