Identified Baryon and Meson Distributions at Large Transverse Momenta fromAu+AuCollisions atsNN=200GeV

Transverse momentum spectra of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, and $\overline{p}$ up to $12\text{ }\text{ }\mathrm{GeV}/c$ at midrapidity in centrality selected $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ are presented. In central $\mathrm{Au}+\mathrm{Au}$ collisions, both ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and $p(\overline{p})$ show significant suppression with respect to binary scaling at ${p}_{T}\ensuremath{\gtrsim}4\text{ }\text{ }\mathrm{GeV}/c$. Protons and antiprotons are less suppressed than ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, in the range $1.5\ensuremath{\lesssim}{p}_{T}\ensuremath{\lesssim}6\text{ }\text{ }\mathrm{GeV}/c$. The ${\ensuremath{\pi}}^{\ensuremath{-}}/{\ensuremath{\pi}}^{+}$ and $\overline{p}/p$ ratios show at most a weak ${p}_{T}$ dependence and no significant centrality dependence. The $p/\ensuremath{\pi}$ ratios in central $\mathrm{Au}+\mathrm{Au}$ collisions approach the values in $p+p$ and $d+\mathrm{Au}$ collisions at ${p}_{T}\ensuremath{\gtrsim}5\text{ }\text{ }\mathrm{GeV}/c$. The results at high ${p}_{T}$ indicate that the partonic sources of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, and $\overline{p}$ have similar energy loss when traversing the nuclear medium.