Brazilian Journal of Physics
On-line version ISSN 1678-4448
ZSCHIESCHE, D. and PORTUGAL, L.. Role of global and local strangeness neutrality in an inhomogeneous freeze-out approach to relativistic heavy ion collisions. Braz. J. Phys. [online]. 2007, vol.37, n.1a, pp. 44-47. ISSN 1678-4448. http://dx.doi.org/10.1590/S0103-97332007000100015.
An inhomogeneous decoupling surface of hadrons produced in relativistic heavy-ion collisions may occur, if the expanding hot and dense matter passes through a first order phase transition. We show that due to the non-linear dependence of the particle densities on the temperature and baryon-chemical potential such inhomogeneities should be visible even in the integrated, inclusive abundances. We analyze experimental data from Pb+Pb collisions at CERN-SPS and Au+Au collisions at BNL-RHIC to determine the amplitude of inhomogeneities and the role of local and global strangeness neutrality.
Keywords : Inhomogeneous freeze-out; Relativistic heavy-ion collisions; Global strangeness neutrality.