{\Upsilon} Production in Heavy Ion Collisions at LHC

We investigate the {\Upsilon} production in heavy ion collisions at LHC energy in the frame of a dynamical transport approach. Both the initial production and in-medium regeneration and both the cold and hot nuclear matter effects are included in the calculations. In comparison with the ground state {\Upsilon}(1s), the excited state {\Upsilon}(2s) is much more sensitive to the heavy quark potential at finite temperature.