APS » PROLA » Phys. Rev. Lett. » Volume 88 » Issue 20

Phys. Rev. Lett. 88, 202301 (2002) [4 pages]

Pseudorapidity Distributions of Charged Particles from Au + Au Collisions at the Maximum RHIC Energy, sqrt[sNN]  =  200 GeV
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I. G. Bearden et al. (BRAHMS Collaboration)
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Received 3 December 2001; revised 14 February 2002; published 2 May 2002

We present charged-particle multiplicities as a function of pseudorapidity and collision centrality for the 197Au+197Au reaction at sqrt[sNN]  =  200 GeV. For the 5% most central events we obtain dNch/dη|η  =  0  =  625±55 and Nch|-4.7≤η≤4.7  =  4630±370, i.e., 14% and 21% increases, respectively, relative to sqrt[sNN]  =  130 GeV collisions. Charged-particle production per pair of participant nucleons is found to increase from peripheral to central collisions around midrapidity. These results constrain current models of particle production at the highest RHIC energy.


©2002 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v88/e202301
DOI: 10.1103/PhysRevLett.88.202301
PACS: 25.75.Dw

* Deceased.

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