Phys. Rev. Lett. 88, 022302 (2001) [4 pages]Energy Dependence of Particle Multiplicities in Central Au+Au CollisionsReceived 8 August 2001; published 27 December 2001 We present the first measurement of the pseudorapidity density of primary charged particles in Au+Au collisions at √sNN = 200GeV. For the 6% most central collisions, we obtain dNch/dη||η|<1 = 650±35(syst). Compared to collisions at √sNN = 130GeV, the highest energy studied previously, an increase by a factor of 1.14±0.05 at 90% confidence level, is found. The energy dependence of the pseudorapidity density is discussed in comparison with data from proton-induced collisions and theoretical predictions. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.022302
DOI:
10.1103/PhysRevLett.88.022302
PACS:
25.75.-q
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