Measurement of J/{psi} Azimuthal Anisotropy in Au+Au Collisions at {sqrt{s_{NN}}} = 200 GeV

TL;DR

This paper reports on the measurement of J/psi azimuthal anisotropy in gold-gold collisions at 200 GeV, finding results consistent with zero elliptic flow for transverse momenta between 2 and 10 GeV/c, indicating limited coalescence contribution.

Contribution

First measurement of J/psi azimuthal anisotropy at 200 GeV in Au+Au collisions, providing insights into charm quark production mechanisms.

Findings

J/psi elliptic flow is consistent with zero for 2-10 GeV/c transverse momentum.

Results suggest limited coalescence from thermalized charm quarks at high transverse momentum.

Measurement constrains models of J/psi production in heavy-ion collisions.

Abstract

The measurement of J/{psi} azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au+Au collisions at {sqrt{s_{NN}}} = 200 GeV. The measured J/{psi} elliptic flow is consistent with zero within errors for transverse momentum between 2 and 10 GeV/c. Our measurement suggests that J/{psi} with relatively large transverse momentum are not dominantly produced by coalescence from thermalized charm quarks, when comparing to model calculations.