Prompt and non-prompt elliptic flow in Pb+Pb collisions at Tev with the ATLAS detector

The elliptic flow of prompt and non-prompt $$ was measured in the dimuon decay channel in Pb+Pb collisions at $$   $$ with an integrated luminosity of $$ with the ATLAS detector at the LHC. The prompt and non-prompt signals are separated using a two-dimensional simultaneous fit of the invariant mass and pseudo-proper decay time of the dimuon system from the $$ decay. The measurement is performed in the kinematic range of dimuon transverse momentum and rapidity $$   $$ , $$ , and 0-60% collision centrality. The elliptic flow coefficient, $$ , is evaluated relative to the event plane and the results are presented as a function of transverse momentum, rapidity and centrality. It is found that prompt and non-prompt $$ mesons have non-zero elliptic flow. Prompt $$ $$ decreases as a function of $$ , while for non-prompt $$ it is, with limited statistical significance, consistent with a flat behaviour over the studied kinematic region. There is no observed dependence on rapidity or centrality.