Enhanced Strange Particle Yields - Signal of a Phase of Massless Particles ? - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Journal of Physics G: Nuclear and Particle Physics Year : 2001

Enhanced Strange Particle Yields - Signal of a Phase of Massless Particles ?

Sven Soff
  • Function : Author
D. Zschiesche
  • Function : Author
M. Bleicher
  • Function : Author
Christoph Hartnack
M. Belkacem
  • Function : Author
L. Bravina
  • Function : Author
E. Zabrodin
  • Function : Author
S. A. Bass
  • Function : Author
H. Stoecker
  • Function : Author
W. Greiner
  • Function : Author

Abstract

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.

Dates and versions

in2p3-00193956 , version 1 (05-12-2007)

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Cite

Sven Soff, D. Zschiesche, M. Bleicher, Christoph Hartnack, M. Belkacem, et al.. Enhanced Strange Particle Yields - Signal of a Phase of Massless Particles ?. Strangeness 2000 International Conference on Strangeness in Quark Matter 5, Jul 2000, Berkeley, United States. pp.449-457, ⟨10.1088/0954-3899/27/3/324⟩. ⟨in2p3-00193956⟩
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