Systematic studies of the centrality and root s(NN) dependence of the dE(T)/d eta and dN(ch)/d eta in heavy ion collisions at midrapidity
The PHENIX experiment at the relativistic heavy ion collider (RHIC) has measured transverse energy and charged particle multiplicity at midrapidity in Au+Au collisions at center-of-mass energies √sNN=19.6,130, and 200GeV as a function of centrality. The presented results are compared to measurements from other RHIC experiments and experiments at lower energies. The √sNN dependence of dET/dη and dNch/dη per pair of participants is consistent with logarithmic scaling for the most central events. The centrality dependence of dET/dη and dNch/dη is similar at all measured incident energies. At RHIC energies, the ratio of transverse energy per charged particle was found to be independent of centrality and growing slowly with √sNN. A survey of comparisons between the data and available theoretical models is also presented.
This article is published as Adler, Stephen Scott, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas et al. "Systematic studies of the centrality and s NN dependence of the d E T/d η and d N ch/d η in heavy ion collisions at midrapidity." Physical Review C 71, no. 3 (2005): 034908. DOI: 10.1103/PhysRevC.71.034908. Posted with permission.