Abstract
production in and collisions at has been measured by the PHENIX experiment at rapidities . The cross sections and nuclear dependence of production versus rapidity, transverse momentum, and centrality are obtained and compared to lower energy results and to theoretical models. The observed nuclear dependence in collisions is found to be modest, suggesting that the absorption in the final state is weak and the shadowing of the gluon distributions is small and consistent with Dokshitzer-Gribov-Lipatov-Altarelli-Parisi-based parametrizations that fit deep-inelastic scattering and Drell-Yan data at lower energies.
- Received 28 July 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.012304
©2006 American Physical Society