BARYON AND ANTIBARYON PRODUCTION IN LEAD-LEAD COLLISIONS AT 158AGEV C/

We report on baryon and antibaryon as well as K+ and K- production cro ss 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 rapidit y 1.4 < y < 6.0, Using a simple thermodynamical and a coalescence mode l the temperature and the chemical potential of the particle source as well as the freeze-out radius of baryons and antibaryons have been de duced. (C) 1998 Elsevier Science B.V.