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Scaling properties in bulk and p[subscript T]-dependent particle production near midrapidity in relativistic heavy ion collisions

Author(s)
Wyslouch, Boleslaw; Wenger, Edward Allen; Veres, Gabor; Verdier, Robin; Vaurynovich, Siarhei S.; Stephans, George S. F.; Reed, C.; Kulinich, Piotr; Kane, J. L.; Henderson, C.; Gulbrandsen, K.; Ballintijn, Maarten; Alver, Burak Han; Busza, Wit; van Nieuwenhuizen, Gerrit J; Roland, Gunther M; Roland, Christof E; Loizides, Constantinos; Li, W.; ... Show more Show less
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Alternative title
Scaling properties in bulk and pT-dependent particle production near midrapidity in relativistic heavy ion collisions
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
The centrality dependence of the midrapidity charged-particle multiplicity density (|η|<1) is presented for Au+Au and Cu+Cu collisions at RHIC over a broad range of collision energies. The multiplicity measured in the Cu+Cu system is found to be similar to that measured in the Au+Au system, for an equivalent Npart, with the observed factorization in energy and centrality still persistent in the smaller Cu+Cu system. The extent of the similarities observed for bulk particle production is tested by a comparative analysis of the inclusive transverse momentum distributions for Au+Au and Cu+Cu collisions near midrapidity. It is found that, within the uncertainties of the data, the ratio of yields between the various energies for both Au+Au and Cu+Cu systems are similar and constant with centrality, both in the bulk yields and as a function of pT, up to at least 4 GeV/c. The effects of multiple nucleon collisions that strongly increase with centrality and energy appear to only play a minor role in bulk and intermediate transverse momentum particle production.
Date issued
2009-08
URI
http://hdl.handle.net/1721.1/54811
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review C
Publisher
American Physical Society
Citation
PHOBOS Collaboration et al. “Scaling properties in bulk and pT-dependent particle production near midrapidity in relativistic heavy ion collisions.” Physical Review C 80.1 (2009): 011901. © 2009 American Physical Society.
Version: Final published version
ISSN
0556-2813

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