Charged particle distributions and transverse dynamics in Au+Au and d+Au collisions at √SNN = 200 GeV from STAR

Results of directed and elliptic flow measurements of charged hadrons at midrapidity and forward rapidities from Au+Au collisions at √SNN 200 GeV will be presented. The pseudorapidity dependence of anisotropic flow and mean transverse momentum will be discussed in connection with the available particle density created in a heavy-ion collision. The measurements of the centrality dependence of dN/dη and transverse momentum spectra from mid-rapidity to forward rapidity in d+Au collisions at 200 GeV are shown to provide a sensitive tool for understanding the dynamics of multi-particle production in the high parton density regime. In particular an explanation of the observed centrality and pseudorapidty dependence of RCP (and RdAu) at forward rapidities due to the initial asymmetry in particle production in d+Au collisions compared to the symmetric p+p collisions will be presented