Strangeness in nuclear collisions

  • Data on the mean multiplicity of strange hadrons produced in minimum bias proton--proton and central nucleus--nucleus collisions at momenta between 2.8 and 400 GeV/c per nucleon have been compiled. The multiplicities for nucleon--nucleon interactions were constructed. The ratios of strange particle multiplicity to participant nucleon as well as to pion multiplicity are larger for central nucleus--nucleus collisions than for nucleon--nucleon interactions at all studied energies. The data at AGS energies suggest that the latter ratio saturates with increasing masses of the colliding nuclei. The strangeness to pion multiplicity ratio observed in nucleon--nucleon interactions increases with collision energy in the whole energy range studied. A qualitatively different behaviour is observed for central nucleus--nucleus collisions: the ratio rapidly increases when going from Dubna to AGS energies and changes little between AGS and SPS energies. This change in the behaviour can be related to the increase in the entropy production observed in central nucleus-nucleus collisions at the same energy range. The results are interpreted within a statistical approach. They are consistent with the hypothesis that the Quark Gluon Plasma is created at SPS energies, the critical collision energy being between AGS and SPS energies.

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Metadaten
Author:Marek GaździckiORCiD, Dieter RöhrichORCiD
URN:urn:nbn:de:hebis:30-17220
DOI:https://doi.org/10.48550/arXiv.hep-ex/9607004
ArXiv Id:http://arxiv.org/abs/hep-ex/9607004
Parent Title (German):IKF–HENPG ; 8–95
Series (Serial Number):IKF–HENPG (8–95)
Publisher:Institut für Kernphysik, Goethe-Universität Frankfurt
Place of publication:Frankfurt am Main
Document Type:Working Paper
Language:English
Date of Publication (online):1996/07/04
Date of first Publication:1996/07/04
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/04
Page Number:28
Source:Z.Phys. C71 (1996), http://arxiv.org/abs/hep-ex/9607004
HeBIS-PPN:184957729
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoDeutsches Urheberrecht