13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Angular correlations between J/$\psi$ mesons and charged hadrons in proton-proton collisions at $\sqrt{s}$ = 13 TeV with ALICE

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Quarkonia Poster Session


Lucas Altenkamper (University of Bergen (NO))


Due to the different energy scales involved in the production of charmonium states in proton-proton collisions, they provide important testing grounds for the theory of Quantum Chromo-Dynamics (QCD). The initial charm-quark pairs are produced in large-$Q^2$ processes that allow for a perturbative treatment while the hadronization into a bound system is non-perturbative.

Different effective theories for the description of charmonium production exist, like the Color Singlet Model, the Color Evaporation Model or the non-relativistic QCD approach. However, none of them describes the production cross-sections and the polarization simultaneously. The correlations of J$/\psi$ mesons and hadrons can provide constraints on the color-singlet or color-octet nature of the pre-resonant charmonium state by measuring the amount of hadronic activity in the vicinity of the J$/\psi$.

In this poster, preliminary ALICE results on the angular correlations between inclusive J$/\psi$ mesons and charged hadrons at mid-rapidity in pp collisions at $\sqrt{s} = 13~\text{TeV}$ will be shown. The high multiplicity triggered data taken by ALICE in Run-2 allows for measurements in high multiplicity events, in addition to the analysis of minimum-bias data. Projections for the LHC Run-3 and Run-4 will also be reported. Our measurements will be compared to model calculations.

Content type Experiment
Collaboration ALICE
Centralised submission by Collaboration Presenter name already specified

Primary author

Lucas Altenkamper (University of Bergen (NO))

Presentation Materials