Elliptic flow measurement of $J/\psi$ in PHENIX Run14 Au+Au at $\sqrt{s_{NN}}=200$ GeV

TL;DR

This paper reports the first measurement of $J/$ elliptic flow at RHIC energies at forward rapidity, using a large dataset, finding results consistent with zero, which impacts understanding of $J/$ production mechanisms.

Contribution

It provides the first $J/$ elliptic flow measurement at RHIC forward rapidity, using the event plane method on a large dataset, offering new insights into quarkonium production.

Findings

$J/$ $v_2$ is consistent with zero at RHIC forward rapidity.

Results suggest coalescence is not a dominant production mechanism at this energy.

Measurement complements LHC results, informing models of quark-gluon plasma.

Abstract

We obtain the first measurement of $J/\psi$ elliptic flow at RHIC energies in forward rapidity using data from the PHENIX detector and applying an event plane method. The dataset used contains 19 billion events from the PHENIX experiment's Run 14 Au + Au dataset at $\sqrt{s_{NN}}=200$ GeV. PHENIX has measured a $J/\psi$ $v_2$ in a centrality range of $10-60\%$ that is consistent with zero. Taken together with results from LHC the measurement of $v_2$, which is consistent with zero may indicate that $J/\psi$ production by coalescence is not significant at forward rapidity at RHIC energy.