$J/\psi$ production as a function of charged-particle multiplicity with ALICE at the LHC

TL;DR

This paper investigates how $J/eta$ production varies with charged-particle multiplicity in proton-proton and proton-lead collisions at the LHC, highlighting the role of multiple partonic interactions in particle production.

Contribution

It presents new measurements of $J/eta$ production as a function of multiplicity and compares these results with various theoretical models, advancing understanding of soft and hard process correlations.

Findings

$J/eta$ production increases with multiplicity in $pp$ and $p$-Pb collisions.

Results suggest multiple partonic interactions influence both soft and hard particle production.

Comparison with models helps refine theoretical descriptions of particle production mechanisms.

Abstract

At LHC energies, the charged-particle multiplicity dependence of particle production is a topic of considerable interest in $pp$ collisions. It has been argued that multiple partonic interactions play an important role in particle production mechanisms, not only affecting the soft processes but also the hard processes. Recently, ALICE has measured $J/\psi$ production as a function of charged-particle multiplicity to study the correlation between soft and hard processes. In this contribution, we present the $J/\psi$ production versus multiplicity for $pp$ and $p-Pb$ collisions measured by ALICE. We compare the results with different theoretical models.