Abstract
New measurements by the PHENIX experiment at the Relativistic Heavy Ion Collider for production at midrapidity as a function of transverse momentum () and collision centrality in GeV and collisions are presented. They indicate nuclear modification factors () which are similar in both magnitude and trend to those found in earlier measurements. Linear fits to as a function of in 5–20 GeV show that the slope is consistent with zero within two standard deviations at all centralities, although a slow rise cannot be excluded. Having different statistical and systematic uncertainties, the and measurements are complementary at high ; thus, along with the extended range of these data they can provide additional constraints for theoretical modeling and the extraction of transport properties.
- Received 26 May 2010
DOI:https://doi.org/10.1103/PhysRevC.82.011902
©2010 American Physical Society