Rapidity equilibration in d + Au and Au + Au systems
Abstract
In a Relativistic Diffusion Model (RDM), the evolution of net-proton rapidity spectra with sqrt(s_NN) in heavy systems is proposed as an indicator for local equilibration and longitudinal expansion. The broad midrapidity valley recently discovered at RHIC in central Au + Au collisions at sqrt(s_NN)= 200 GeV suggests rapid local equilibration which is most likely due to deconfinement, and fast longitudinal expansion. Rapidity spectra of produced charged hadrons in d + Au and Au + Au systems at RHIC energies and their centrality dependence are well described in a three-sources RDM. In central collisions, about 19 % of the produced particles are in the equilibrated midrapidity region for d + Au.
Cite
@article{arxiv.hep-ph/0509108,
title = {Rapidity equilibration in d + Au and Au + Au systems},
author = {Georg Wolschin},
journal= {arXiv preprint arXiv:hep-ph/0509108},
year = {2009}
}
Comments
10 pages, 4 figures; QGPTH05 Vienna; references updated