Transverse-Momentum and Collision-Energy Dependence of High- p T Hadron Suppression in A u + A u Collisions at Ultrarelativistic Energies

We report high statistics measurements of inclusive charged hadron production in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ and $p+p$ collisions at $\sqrt{{s}_{\mathrm{N}\mathrm{N}}}=200\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$. A large, approximately constant hadron suppression is observed in central $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions for $5\mathrm{<}{p}_{T}\mathrm{<}12\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$. The collision energy dependence of the yields and the centrality and ${p}_{T}$ dependence of the suppression provide stringent constraints on theoretical models of suppression. Models incorporating initial-state gluon saturation or partonic energy loss in dense matter…