Abstract

We report on baryon and antibaryon as well as K+ and K- production cross sections measured in lead-lead collisions at 158 GeV/c per nucleon, The presented data were taken at zero degree production angle with a minimum bias trigger. The measurements covered a wide range of rapidity 1.4 y 6.0, Using a simple thermodynamical and a coalescence model the temperature and the chemical potential of the particle source as well as the freeze-out radius of baryons and antibaryons have been deduced. (C) 1998 Elsevier Science B.V.