Prompt and non-prompt $J/\psi$ elliptic flow in Pb+Pb collisions at $\sqrt{s_\text{NN}}=5.02$ TeV with the ATLAS detector

The elliptic flow of prompt and non-prompt $J/\psi$ was measured in the dimuon decay channel in Pb+Pb collisions at $\sqrt{s_\text{NN}}=5.02$ TeV with an integrated luminosity of 0.42 $\mathrm{nb}^{-1}$ with ATLAS at the LHC. The prompt and non-prompt signals are separated using a two-dimensional simultaneous fit of the invariant mass and pseudo-proper time of the dimuon system from the \jpsi decay. The measurement is performed in the kinematic range $9<p_\mathrm{T}<30$ GeV, $|y|<2$ and $0-60\%$ collision centrality. The elliptic flow is evaluated with respect to the event plane and the results are presented as a function of transverse momentum, rapidity and centrality. It is observed that prompt and non-prompt $J/\psi$ mesons have non-zero elliptic flow. Prompt $J/\psi$ $v_2$ decreases as a function of $p_\mathrm{T}$, while non-prompt $J/\psi$ $v_2$ is flat over the studied kinematical region. There is no observed dependence on rapidity or centrality.