Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-04-27
J.Phys.G35:104131,2008
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 6 figures, presented at the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, "Quark Ma
Scientific paper
10.1088/0954-3899/35/10/104131
The PHOBOS experiment at RHIC has the unique capability of measuring particle production at very low transverse momenta. New results on low-transverse momentum invariant yields of pions, kaons, protons and antiprotons in 200 GeV Au+Au collisions are presented as a function of the collision centrality for the 50% most central events. In contrast to the results from d+Au collisions, no $m_{T}$ scaling is observed in the very low $p_{T}$ region. The low transverse momentum yields agree with extrapolations from intermediate transverse momentum measurements. For all collision centralities a flattening of the transverse momentum spectra is observed, consistent with a rapid transverse expansion of the system.
for the PHOBOS Collaboration
Gburek Tomasz
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