Bochum 1998 – scientific programme
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HK: Hadronen und Kerne
HK 65: Heavy Ion Reactions VIII, Ultrarelativistic Energies
HK 65.6: Group Report
Thursday, March 19, 1998, 15:30–16:00, F
Strangeness Production and J/ψ Absorption in the HSD Approach — •J. Geiß, C. Greiner, E.L. Bratkovskaya, W. Cassing, and U. Mosel — Institut für Theoretische Physik, Universität Giessen
We study the production of strange particles and cc pairs within the
covariant transport approach HSD in the cascade modus. The production of
mesons and baryon-antibaryon pairs is treated within the LUND string model [1],
while the production of cc pairs is treated perturbatively
employing experimental cross sections. We discuss the strangeness production
of the elementary hadron-hadron collisions and show the resulting
enhancement of the strangeness yield due to
rescattering processes for different systems from
AGS to SPS energies. Further on we consider the dissociation
of the cc pairs by baryons and strings.
The dissociation of cc by the strings or the color electric
flux tubes is treated in a pure geometrical picture with the string radius
Rs as a new parameter. Adopting 6 mb for the cc baryon cross
section we discuss the J/Ψ absoption as a function of Rs
for different systems at SPS energies and compare them to NA38 and NA50 data.
[1] B. Anderson, G. Gustafson, Hong Pi, Z. Phys. C 57(485), (1993)
Supported by BMBF and GSI Darmstadt