# Quark Matter 2017

5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

## Measurements of J/psi polarization in p+p,p+Au and Au+Au collisions at √sNN = 200 GeV by the STAR experiment

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: B15
Poster

Siwei Luo

### Description

Quarkonium production mechanisms in hadron collisions are not fully understood. Different models on quarkonium production can describe the measured production cross-sections in p+p collisions but have significantly different predictions on quarkonium polarization. Measurements of J/psi polarization in p+p collisions can distinguish these models to test the fundamental theory on quarkonium production. Measurements of J/psi polarization in p+Au and Au+Au collisions can provide insights into cold and hot nuclear matter effects on quarkonium production, which has been used extensively to study the properties of Quark-Gluon Plasma. In this poster, we will present the measurements of J/psi polarization in p+p collisions at $\sqrt{s}$ = 200 GeV using data taken in 2012 by the STAR experiment. We will also present the progress on J/psi polarization measurements in p+Au and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV using the data taken in 2011 and 2015.

Preferred Track Quarkonia STAR