Volume 78, Number 2, April 2007
Article Number 22001
Number of page(s) 5
Section Nuclear Physics
Published online 28 March 2007
EPL, 78 (2007) 22001
DOI: 10.1209/0295-5075/78/22001

Hadron production in heavy relativistic systems

Rolf Kuiper and Georg Wolschin

Institut für Theoretische Physik - Philosophenweg 16, 69120 Heidelberg, Germany

received 29 December 2006; accepted in final form 1 March 2007; published April 2007
published online 28 March 2007

We investigate particle production in heavy-ion collisions at RHIC energies as a function of incident energy, and centrality in a three-sources Relativistic Diffusion Model. Pseudorapidity distributions of produced charged hadrons in Au + Au and Cu + Cu collisions at $\sqrt{s_{NN}} = 19.6 $ GeV, 62.4 GeV, 130 GeV and 200 GeV show an almost equilibrated midrapidity source that tends to increase in size towards higher incident energy, and more central collisions. It may indicate quark-gluon plasma formation prior to hadronization.

25.75.-q - Relativistic heavy-ion collisions.
24.60.Ky - Fluctuation phenomena.
24.10.Jv - Relativistic models.

© Europhysics Letters Association 2007