TAR Introduction and motivation Open charm K Total charm cross section 1)test perturbative QCd prediction 2)input the cross section to do model calculation -Radial and elliptic flow d)bulk Qcd medium properties density, the drag coefficient and viscosity 2)test light flavor thermalization -Energy loss D K T e Jin-------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------- F. Jin 2 Open charm –Total charm cross section 1) test perturbative QCD prediction 2) input the cross section to do model calculation –Radial and elliptic flow 1) bulk QCD medium properties ( density, the drag coefficient and viscosity ) 2) test light flavor thermalization –Energy loss Introduction and Motivation