DOI 10.1007/s100529900231
A second look at single-photon production in S + Au collisions at 200 A GeV and implications for quark-hadron phase transition
D.K. Srivastava1 - B.C. Sinha1,2
1 Variable Energy Cyclotron Centre,
1/AF Bidhan Nagar, Calcutta 700 064, India
2 Saha Institute of Nuclear Physics,
1/AF Bidhan Nagar, Calcutta 700 064, India
Received: 21 June 1999 / Revised version: 25 August 1999 / Published online: 16 November 1999
Abstract
We reanalyze the production of single photons in S + Au collisions
at CERN SPS to investigate: (i) the consequences of using a
much richer equation of state for hadrons than the one used in an earlier
study by us, and (ii) to see if the recent estimates of photon
production in quark matter (at two-loop level) by Aurenche, et al.
are consistent with the upper limit of the photon production
measured by the WA80 group. We find that the data
are consistent with a quark-hadron phase transition. The data
are also consistent with a scenario where no phase transition
takes place, but where the hadronic matter reaches a density
of several hadrons per unit volume, which is rather
unphysical.
Copyright Springer-Verlag 2000
