First measurement of J/ψ anisotropy by PHENIX experiment at RHIC

Understanding the J/psi suppression and possible recombination mechanisms at RHIC is one of the outstanding challenges for theorists and experimentalists. Recent results provided by PHENIX showed a stronger suppression at forward rapidity, while at mid-rapidity the suppression is similar to lower energy collision experiments. A large sample of Au + Au collisions at root s(NN) = 200 GeV was collected in 2007 with the PHENIX experiment at RHIC. Using this sample, J/psi s were identified in the di-electron decay channel. In order to probe the charm coalescence as an additional J/psi production mechanism at RHIC, we studied the first determination of its v (2) elliptic flow parameter at mid-rapidity.