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

- Institution: CERN
- Department: Conferences
- Speaker: Qian Yang
- Year: 2020
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3001168)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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..

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## Lectures

1. [$J/\psi$ production in jets in p+p collisions at $\sqrt{s}$ = 500 GeV by STAR](https://invisiblenetwork.ai/learn/cern/3001168/cf4cd3f9033b), 20 min (CERN's player)