ATLAS results on quarkonia and heavy flavor production

The associated production a vector boson with $J / \psi $ is a key observable for understanding of the quarkonium production mechanisms, including the separation of single and double parton scattering components. Measurements from the ATLAS detector at LHC on quarkonium production, including associated production of a $W^{\pm }$ + $J / \psi $ and $Z$ $+$ $J / \psi $ are presented. A study of the hidden-charm states $X$(3872) is also provided