Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ Collisions at $\sqrt{s_{NN}}=200\mathrm{G}\mathrm{e}\mathrm{V}$

We present STAR measurements of the azimuthal anisotropy parameter $v_2$ and the binary-collision scaled centrality ratio $R_{\mathrm{C}\mathrm{P}}$ for kaons and lambdas ($\Lambda +\overline{\Lambda }$) at midrapidity in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at $\sqrt{s_{NN}}=200\mathrm{G}\mathrm{e}\mathrm{V}$. In combination, the $v_2$ and $R_{\mathrm{C}\mathrm{P}}$ particle-type dependencies contradict expectations from partonic energy loss followed by standard fragmentation in vacuum. We establish $p_T\approx 5\mathrm{G}\mathrm{e}\mathrm{V}/c$ as the value where the centrality dependent baryon enhancement ends. The $K_S^0$ and $\Lambda +\overline{\Lambda }$ $v_2$ values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.