Longitudinal expansion of matter formed by partial stopping in relativistic heavy ion collisions
Abstract
We investigate the modification of Landau's solution of hydrodynamic expansion of a fireball formed in relativistic heavy ion collisions when there is partial transparency. In our model of collision we assume that the transparent fraction (of nuclei) creates a color flux tube behind it which eventually produces QCD matter (tfluid) outside the central QCD matter (sfluid) formed by stopped nuclei. Thus the sfluid expands against the nonzero pressure due to the tfluid when the transparency is small. It makes the boundary condition on the expanding side of the sfluid different from that of Landau and hence leads to a new solution of the hydrodynamic equations. Using the new solution we calculate the particle multiplicity distribution which is different from that of Landau, and the modification depends on the fraction of stopping.
 Publication:

Nuclear Physics A
 Pub Date:
 February 1995
 DOI:
 10.1016/03759474(95)00206G
 Bibcode:
 1995NuPhA.591..738B