Abstract
The PHOBOS Collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at √s NN =200 and 62.4 GeV. The nuclear modification factor R N AA part 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 N AA part is essentially the same in both systems over the full range of p Tthat 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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Wenger, E., the PHOBOS Collaboration. Energy and system size dependence of charged hadron transverse momentum spectra from Cu+Cu and Au+Au collisions at √S NN =62.4 and 200 GeV. Acta Phys. Hung. A 27, 271–274 (2006). https://doi.org/10.1556/APH.27.2006.2-3.21
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DOI: https://doi.org/10.1556/APH.27.2006.2-3.21