# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## J/$\psi$ production at mid-rapidity in p-Pb collisions with the ALICE detector

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Heavy flavor and quarkonium

### Speaker

Shinichi Hayashi (University of Tokyo (JP))

### Description

The understanding of cold nuclear matter (CNM) effects are essential to study the properties of a state of deconfined quarks and gluons, the quark-gluon plasma, created in relativistic heavy-ion collisions. CNM effects can be studied in p-Pb collisions.
Furthermore, some results in high-multiplicity p-Pb collisions suggest collectivity similar to that in Pb-Pb collisions. For J/$\psi$ production, a positive second-order flow coefficient ($v_{2}$) was observed at forward and backward rapidity and the origin of this J/$\psi$ $\it{v}_{2}$ remains an open question.
The centrality dependent nuclear modification factor ($\it{Q}_{\rm{pPb}}$) as a function of transverse momentum ($\it{p}_{\rm{T}}$) was also measured at backward and forward rapidity. At backward rapidity an enhancement of the J/$\psi$ yield was observed around intermediate $\it{p}_{\rm{T}}$ in central p-Pb collisions, while the J/$\psi$ yield is strongly suppressed at low $\it{p}_{\rm{T}}$ at forward rapidity.

A multi-differential analysis with respect to collision centrality and $\it{p}_{T}$ is performed for inclusive J/$\psi$ production at mid-rapidity via the dielectron decay channel with the ALICE detector. In this poster, the centrality dependence of the inclusive J/$\psi$ production will be presented as well as the inclusive J/$\psi$ nuclear modification factor in minimum bias events. We will discuss CNM effects and other collective effects on J/$\psi$ production in p-Pb collisions by comparing the results to the J/$\psi$ measurement at backward and forward rapidity.

### Primary author

Shinichi Hayashi (University of Tokyo (JP))