# Charmonium production in pp collisions with ALICE at the LHC

## TL;DR

This paper presents comprehensive measurements of charmonium production in proton-proton collisions at the LHC, including cross sections, polarization, and correlations, providing valuable data to test QCD models.

## Contribution

It offers new experimental results on charmonium production in pp collisions at various energies and rapidities, comparing them with theoretical model predictions.

## Key findings

- Measured pT-differential cross sections for J/ψ and ψ(2S)
- Performed J/ψ polarization measurements
- Analyzed correlations between J/ψ and charged hadrons

## Abstract

Charmonia, bound states of charm and anti-charm quarks, represent an interesting probe for the study of Quantum Chromodynamics (QCD) since their production involves both hard and soft energy scales. Several effective models are available to describe the production of charmonia, but so far none have been able to describe all experimental observables simultaneously. ALICE has studied the production of charmonia in different collision systems at all available LHC energies at both mid- and forward-rapidity down to zero transverse momentum. In this contribution, different measurements performed in proton--proton (pp) collisions are presented, namely $p_{\text{T}}$-differential cross sections of inclusive J/$\psi$ and $\psi(2\text{S})$, inclusive J/$\psi$ polarization measurements and the latest results on correlations between inclusive J/$\psi$ and unidentified charged hadrons. The results are also compared to model predictions.