J/ψ production in $Ru+Ru$ and $Zr+Zr$ collisions at √sNN = 200 GeV$ with the STAR experiment

{In this contribution, we present the measurements of the inclusive J/ψ yield and elliptic flow (v₂) at midrapidity (|y| < 1.0) in Ru+Ru and Zr+Zr collisions at √sNN = 200 GeV by the STAR experiment. The centrality and transverse momentum (pT) dependences of the nuclear modification factor (RAA) are measured with much better precision compared to the previous measurements in Au+Au collisions at the same collision energy. The pT dependence of inclusive J/ψ elliptic flow (v₂) in the same collision systems at |y| < 1.0 are also presented. Two methods, the Scalar-Product method and the event-plane method are used individually to extract the J/ψ v₂ in Zr+Zr and Ru+Ru collisions. The two methods' results are consistent in the overlap pT range. The measurements of the inclusive J/ψ yield and v₂ are compared to the same results in Au+Au collisions at √sNN = 200 GeV, and then physics implications are discussed.}