Identified Baryon and Meson Distributions at Large Transverse Momenta from Au+Au Collisions at √sNN=200 GeV

Transverse momentum spectra of π^±, p, and p̅ up to 12  GeV/c at midrapidity in centrality selected Au+Au collisions at √sNN=200   GeV are presented. In central Au+Au collisions, both π^± and p(p̅ ) show significant suppression with respect to binary scaling at p_T≳4  GeV/c. Protons and antiprotons are less suppressed than π^±, in the range 1.5≲p_T≲6  GeV/c. The π-/π+ and p̅ /p ratios show at most a weak p_T dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at p_T≳5  GeV/c. The results at high p_T indicate that the partonic sources of π^±, p, and p̅ have similar energy loss when traversing the nuclear medium.