Speaker
Description
Measurements of heavy quarkonia in heavy-ion collisions play a crucial role in studying the properties of the quark-gluon plasma (QGP). The dissociation of J/$\psi$, caused by the color screening effect, was proposed as a direct signature of the QGP formation. However, recombination of deconfined charm-anticharm (c$\bar{c}$) pairs complicates the interpretation of the observed J/$\psi$ suppression in heavy-ion collisions, and its contribution is expected to be smaller at lower collision energies. Therefore, measuring the beam energy dependence of J/$\psi$ production will help disentangle different effects.
In this poster, we report the measurements of inclusive J/$\psi$ production in Au+Au collisions at $\sqrt{\mathrm{s_{NN}}}$ = 14.6, 19.6 and 27 GeV using the Beam Energy Scan Phase II (BES-II) data recorded by the STAR experiment. The J/$\psi$ invariant yields and nuclear modification factors ($R_{AA}$) are presented as a function of centrality and transverse momentum. Beam energy dependence of J/$\psi$ $R_{AA}$ is discussed together with model comparisons.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | The STAR Collaboration |
