Enhanced strange particle yields : signal of a phase of massless particles?

The yields of strange particles are calculated with the UrQMD model for p,Pb(158 AGeV)Pb collisions and compared to experimental data. The yields are enhanced in central collisions if compared to proton induced or periph
The yields of strange particles are calculated with the UrQMD model for p,Pb(158 AGeV)Pb collisions and compared to experimental data. The yields are enhanced in central collisions if compared to proton induced or peripheral Pb+Pb collisions. The enhancement is due to secondary interactions. Nevertheless, only a reduction of the quark masses or equivalently an increase of the string tension provides an adequate description of the large observed enhancement factors (WA97 and NA49). Furthermore, the yields of unstable strange resonances as the Lambda star(1520) resonance or the phi meson are considerably affected by hadronic rescattering of the decay products.
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Metadaten
Author:Sven Soff, Detlef Zschiesche, Marcus Bleicher, Christoph Hartnack, Mohamed Belkacem, Larissa V. Bravina, Eugene E. Zabrodin, Steffen A. Bass, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-7144
Document Type:Preprint
Language:English
Date of Publication (online):2005/04/14
Year of first Publication:2000
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/04/14
Source:http://de.arxiv.org/abs/nucl-th/0010103 , Contribution to Strangeness 2000 Conf., published in Journal-ref: J.Phys. G27 (2001) 449-458
HeBIS PPN:12880341X
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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