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Freeze-Out Parameters in Central158AGeVP208b+PbCollisions
1999
Physical Review Letters
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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