Charmonium transverse momentum distribution in high energy nuclear collisions
The charmonium transverse momentum distribution is more sensitive to the nature of the hot quantum chromodynamic matter created in high energy nuclear collisions compared with the yield. Taking a detailed transport approach for charmonium motion together with a hydrodynamic description for the medium evolution, the cancellation between the two hot nuclear matter effects, the dissociation and the regeneration, controls the charmonium transverse momentum distribution. In particular, the second moment of the distribution can be used to differentiate between the hot mediums produced at SPS, RHIC and LHC energies.