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Dear Berndt and Peter,
I would like to follow up on Emanuele's remarks on strangeness:
I was also surprised that the issue of global enhancement of strangeness
was totally missing from the draft of HIPS98 summary (maybe our community
has already gotten used to it, but, for the outsiders, it is surely,
non trivial experimental fact).
The argument that strangeness=1 particles could be enhanced by rescattering,
final-state interactions, etc. is, of course, correct, but it explains only
~40-50% of the observed effect. It has been shown (QM'97, Tsukuba, G.Odyniec,
fig.8) that all (except DPM, which has some other problems and
was discussed separately) available models, 9 of them, (some of them
included quite exotic processes) are much lower than the experimental data
when enhancement, defined by (E_s in AA or pA) - (E_s in pp), is discussed.
Moreover, when discussing multistrange hyperons, only omega enhancement
was mentioned. Let me stress again that we have beautiful data on
cascades as well and the enhancement of ~ factor 10 is observed with respect
to pp and pA (there is a WA97 Phys.Lett. B 433(1998)209 and
NA49 nucl-ex/9810005 preprint which is already accepted for publication in
Phys.Lett.B)
In my opinion, those experimental observables, so supportive of a plasma
scenario, should get more exposure.
sicerely yours,
Grazyna Odyniec