\documentclass[12pt, a4paper]{ncku_report} \usepackage{amssymb} \usepackage{fontspec} \usepackage{xeCJK} \setmainfont{Times New Roman} \usepackage{subfigure} \usepackage{graphicx} \usepackage[font=small]{caption} \usepackage{tabularx} \usepackage{tabu} \usepackage{amsfonts} \usepackage{mathtools} \usepackage{comment} \usepackage{slashbox} \usepackage{rotating} \usepackage{enumerate} \usepackage{lineno} \usepackage{booktabs,threeparttable} \usepackage[colorlinks, linkcolor=black, citecolor=black]{hyperref} \usepackage [autostyle, english = american]{csquotes} \usepackage[autostyle]{csquotes} \renewcommand*{\thefootnote}{\fnsymbol{footnote}} \usepackage{pdfpages} \usepackage{pgffor} \usepackage{multirow} \begin{document} \linenumbers \begin{center} \textbf{Study of $J/\psi$ elliptic flow in Zr+Zr and Ru+Ru collisions at $\sqrt{s_{NN}}$=200 GeV with the STAR experiment} \\ \medskip Yu-Ming Liu$^a$, Yi Yang$^a$, Fuqiang Wang$^b$ \\ $^a$National Cheng Kung University, \\ $^b$Purdue University \end{center} \bigskip Quark-gluon plasma (QGP) is an interacting localized assembly of quarks and gluons at thermal and chemical equilibrium at extremely high temperature or density. It is believed that the suppressed $J/\psi$ production in relativistic heavy-ion collisions is one of the important experimental observations for the production of the QGP. However, in order to correctly interpret those results, the hot and cold nuclear effects need to be distinguished. The elliptic flow ($v_{2}$) of the $J/\psi$ mesons is another way to study the properties of QGP. Measurements of $J\psi$ $v_{2}$ in different collision systems and energies will provide unique and important information. In this contribution, we will present the progress of the study of $J\psi$ $v_{2}$ in different transverse momentum and centrality intervals using Zr+Zr and Ru+Ru collisions at $\sqrt{s_{NN}}$=200 GeV with the STAR experiment at RHIC. \end{document}