TY  - INPR
A1  - Soff, Sven
A1  - Zschiesche, Detlef
A1  - Bleicher, Marcus
A1  - Hartnack, Christoph
A1  - Belkacem, Mohamed
A1  - Bravina, Larissa
A1  - Zabrodin, Eugene E.
A1  - Bass, Steffen A.
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Enhanced strange particle yields : signal of a phase of massless particles?
N2  - 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.
Y1  - 2000
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/4787
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-7144
UR  - http://de.arxiv.org/abs/nucl-th/0010103
N1  - Contribution to Strangeness 2000 Conf., published in Journal-ref: J.Phys. G27 (2001) 449-458
ER  -