منابع مشابه
Study of chemical equilibrium in nucleus-nucleus collisions at AGS and SPS energies
We present a detailed study of chemical freeze-out in nucleus-nucleus collisions at beam energies of 11.6, 30, 40, 80 and 158A GeV. By analyzing hadronic multiplicities within the statistical hadronization approach, we have studied the strangeness production as a function of centre of mass energy and of the parameters of the source. We have tested and compared different versions of the statisti...
متن کاملContribution of pre-equilibrium gluons to J/Ψ suppression in Lead-Lead collisions at 158AGeV
We point out that dissociation of J/Ψ by partons (mostly gluons) produced in semi-hard nucleon-nucleon sub-collisions may explain at least a part of the spectacular J/Ψ suppression observed recently by the NA-50 Collaboration in Pb-Pb interactions at the CERN-SPS.Our arguments are based on a model in which individual nucleon-nucleon interactions in heavy ion collisions are harder than interacti...
متن کاملThermal dileptons at SPS energies
Abstract. Clear signs of excess dileptons above the known sources were found at the SPS since long. However, a real clarification of these observations was only recently achieved by NA60, measuring dimuons with unprecedented precision in 158A GeV In-In collisions. The excess mass spectrum in the region M<1 GeV is consistent with a dominant contribution from ππ → ρ → μμ annihilation. The associa...
متن کاملStrangeness production at SPS energies
We present a summary of measurements of strange particles performed by the experiment NA49 in central and minimum bias Pb+Pb collisions in the beam energy range 20A 158A GeV. New results on Ξ production in central Pb+Pb collisions and on Λ, Ξ production in minimum bias collisions are shown. Transverse mass spectra and rapidity distributions of strange particles at different energies are compare...
متن کاملA GeV at CERN SPS
The measurement of multiple strange particles provides information on the hadronization features of strongly interacting matter produced in heavy ion collisions. If we assume that a deconfinement phase transition occurs in a heavy ion collision, we have to look for qualitative changes (onset phenomena) when varying external parameters like system size and energy density. Therefore we study the ...
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ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 2005
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/31/6/067