# 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

May 31, 2020 to June 5, 2020
Online
US/Central timezone

## $J/\psi$ production in jets in p+p collisions at $\sqrt{s}$ = 500 GeV by STAR

Jun 2, 2020, 12:55 PM
20m
https://cern.zoom.us/j/99039751545

#### https://cern.zoom.us/j/99039751545

Oral Presentation Heavy Flavor and Quarkonia

### Speaker

Dr Qian Yang (Shandong University)

### Description

The suppression of $J/\psi$ production caused by the color-screening effect in heavy-ion collisions is considered as an evidence of the creation of quark-gluon plasma. To interpret the observed suppression in heavy-ion collisions, a good understanding of its production mechanism in p+p collisions is needed. However, the production of $J/\psi$ in hadronic collisions remains not fully understood and requires further studies. Recently, $J/\psi$ production in jets was proposed as a useful observable to help explore the $J/\psi$ production mechanism, and to differentiate various $J/\psi$ production models.

In this talk, we will present the measurement of the fraction of charged jet transverse momentum ($p_{T}$) carried by the $J/\psi$ meson, z($J/\psi$) $\equiv$ $p_{T}(J/\psi)$/$p_{T}(jet)$, at mid-pseudorapidity ($|\eta|<1$) with a kinematic cut of $p_{T}(J/\psi)>$5 GeV/c in p+p collisions at $\sqrt{s}$ = 500 GeV by the STAR experiment. The comparison to model calculations and similar measurements carried out at the LHC will be presented, and its physics implications will be discussed.

Track Heavy Flavor and Quarkonia STAR Contributed Talk

### Presentation materials

 Qian_HPs_final.pdf Recording