Abstract
Transverse momentum spectra of , , and up to at midrapidity in centrality selected collisions at are presented. In central collisions, both and show significant suppression with respect to binary scaling at . Protons and antiprotons are less suppressed than , in the range . The and ratios show at most a weak dependence and no significant centrality dependence. The ratios in central collisions approach the values in and collisions at . The results at high indicate that the partonic sources of , , and have similar energy loss when traversing the nuclear medium.
- Received 1 June 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.152301
©2006 American Physical Society