Energy Dependence of Particle Multiplicities in Central Au+Au Collisions
Abstract
We present the first measurement of the pseudorapidity density of primary charged particles in Au+Au collisions at (sNN) = 200 GeV. For the 6% most central collisions, we obtain dNch/dη\|\|η\|<1 = 650+/-35(syst). Compared to collisions at (sNN) = 130 GeV, 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2001
- DOI:
- 10.1103/PhysRevLett.88.022302
- arXiv:
- arXiv:nucl-ex/0108009
- Bibcode:
- 2001PhRvL..88b2302B
- Keywords:
-
- Nuclear Experiment;
- High Energy Physics - Experiment
- E-Print:
- 4 pages, 6 figures, submitted to PRL