Evolution of the Nuclear Modification Factors with Rapidity and Centrality in d+Au Collisions at √(NSN)=200 GeV
Abstract
We report on a study of the transverse momentum dependence of nuclear modification factors RdAu for charged hadrons produced in deuteron + gold collisions at √(sNN)=200 GeV, as a function of collision centrality and of the pseudorapidity (η=0, 1, 2.2, 3.2) of the produced hadrons. We find a significant and systematic decrease of RdAu with increasing rapidity. The midrapidity enhancement and the forward rapidity suppression are more pronounced in central collisions relative to peripheral collisions. These results are relevant to the study of the possible onset of gluon saturation at energies reached at BNL RHIC.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2004
- DOI:
- 10.1103/PhysRevLett.93.242303
- arXiv:
- arXiv:nucl-ex/0403005
- Bibcode:
- 2004PhRvL..93x2303A
- Keywords:
-
- 25.75.Dw;
- 13.85.Hd;
- 24.85.+p;
- Particle and resonance production;
- Inelastic scattering: many-particle final states;
- Quarks gluons and QCD in nuclei and nuclear processes;
- Nuclear Experiment
- E-Print:
- Four pages, four figures. Published in PRL. Figures 1 and 2 have been updated, and several changes made to the text