APS » PROLA » Phys. Rev. Lett. » Volume 83 » Issue 5

Phys. Rev. Lett. 83, 926 - 930 (1999)

Freeze-Out Parameters in Central 158A GeV 208Pb+Pb Collisions
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M. M. Aggarwal et al. (WA98 Collaboration)
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Received 29 January 1999

Neutral pion production in central 158A GeV 208Pb+ 208Pb collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron. The π0 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 one 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.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v83/p926
DOI: 10.1103/PhysRevLett.83.926
PACS: 25.75.Dw, 24.10.Pa

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