Abstract
We present transverse momentum distributions of charged hadrons produced in collisions at and 200 GeV. The spectra are measured for transverse momenta of at and at , in a pseudorapidity range of . The nuclear modification factor is calculated relative to data at both collision energies as a function of collision centrality. At a given collision energy and fractional cross section, is observed to be systematically larger in collisions compared to . However, for the same number of participating nucleons, is essentially the same in both systems over the measured range of , in spite of the significantly different geometries of the and systems.
- Received 9 December 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.212301
©2006 American Physical Society