Production of ■ in heavy ion collisions

The yields of ■ with its two possible configurations, i.e., the hadronic molecular state and tetraquark state, for Pb-Pb collisions at ■= 5.02 TeV is studied. A volume effect is found from the centrality distribution of ■, which could help to distinguish the inner structure of ■. We also show the rapidity and the transverse momentum distributions of ■ production as well as its elliptic flow coefficient as a function of the transverse momentum.