Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2005-11-19
Acta Phys.Hung. A27 (2006) 271-274
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 2 figures, QM2005 Conference poster proceedings published in Acta Physica Hungarica A
Scientific paper
The PHOBOS collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at sqrt(s_(NN)) = 200 and 62.4 GeV. The nuclear modification factor R_(AA)^(Npart) is calculated relative to p+p data at both collision energies as a function of collision centrality. For the same number of participating nucleons, R_(AA)^(Npart) is essentially the same in both systems over the full range of p_(T) that is measured. In addition, we observe that within experimental uncertainties, the ratio of 200 GeV to 62.4 GeV Cu+Cu yields has only a moderate centrality dependence and is consistent with the value previously measured in Au+Au collisions for a broad range of p_(T).
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