Freeze-Out Parameters in Central158AGeVP208b+PbCollisions

M. M. Aggarwal, A. Agnihotri, Z. Ahammed, A. L. S. Angelis, V. Antonenko, V. Arefiev, V. Astakhov, V. Avdeitchikov, T. C. Awes, P. V. K. S. Baba, S. K. Badyal, A. Baldine (+159 others)
1999 Physical Review Letters  
Neutral pion production in central 158AGeV Pb+Pb collisions has been studied in the WA98 experiment at the CERN SPS. The pi0 transverse mass spectrum has been analyzed in terms of a thermal model with hydrodynamic expansion. The high accuracy and large kinematic coverage of the measurement allow to limit previously noted ambiguities in the extracted freeze-out parameters. The results are shown to be sensitive to the shape of the velocity distribution at freeze-out.
doi:10.1103/physrevlett.83.926 fatcat:qagyv766pnaanlio6pmddomwqm