18-23 March 2018
Florianopolis, Brazil
America/Sao_Paulo timezone

## J/$\psi$ production as a function of event multiplicity in pp collisions at $\sqrt{s}$ = 13 TeV using EMCal-triggered events with ALICE at the LHC

20 Mar 2018, 16:00
1h
Florianopolis, Brazil

Poster

### Speaker

Cristiane Jahnke (Technische Universitaet Muenchen (DE))

### Description

The study of the J/$\psi$ production in pp collisions provides important information on perturbative and non-perturbative quantum chromodynamics. The production of the heavy-quark pair can be described perturbatively while its hadronisation into quarkonium state is a non-perturbative process. These processes are not fully understood and additional experimental data are necessary to further constrain the theoretical production models. Additionally, using high multiplicity pp events, we can study how charmonium production depends on the event activity. These measurements are used to investigate the possible influence of multiple partonic interactions to the J/$\psi$ production and the interplay between soft and hard processes. In this work we report studies of J/$\psi$ production as a function of event multiplicity in pp collisions at $\sqrt{s}$ = 13 TeV at mid-rapidity with ALICE. The J/$\psi$ are reconstructed via their dielectron decay channel in events where at least one of the decay electrons was triggered on by the Electromagnetic Calorimeter (EMCal). The availability of a high-$p_{\rm T}$ electron trigger enhances the sampled luminosity significantly relative to the available minimum-bias triggered data set and extends the $p_{\rm T}$ reach for the J/$\psi$ measurement. Using these data, the J/$\psi$ measurement is performed in the transverse momentum interval $8 < p_{\rm T} < 40~\textrm{GeV}/c$.

### Primary author

Cristiane Jahnke (Technische Universitaet Muenchen (DE))

### Presentation materials

 Cristiane_Jahnke_poster_Hadrons2018_v3.pdf Proceeding: J/$\psi$ production as a function of event multiplicity in pp collisions at $\sqrt{s}$ = 13 TeV using EMCal-triggered events with ALICE at the LHC