Universal pion freeze-out phase-space density

Details Universal pion freeze-out phase-space density Universal pion freeze-out phase-space density

1999-02-15

arxiv.org/abs/hep-ph/9902342v1

Phys.Lett.B457:347-352,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages LaTeX, including 6 postscript figures

Scientific paper

10.1016/S0370-2693(99)00481-5

Results on the pion phase-space density at freeze-out in sulphur-nucleus,
Pb-Pb and pi-p collisions at the CERN SPS are presented. All heavy-ion
reactions are consistent with the thermal Bose-Einstein distribution
f=1/[exp(E/T)-1] at T ~ 120 MeV, modified for radial expansion. pi-p data are
also consistent with f, but at T ~ 180 MeV and without radial flow.

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