Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 27: Heavy Ions III
HK 27.4: Vortrag
Mittwoch, 13. März 2002, 12:15–12:30, E
Dilepton radiation from a fireball — •Thorsten Renk1, Roland A. Schneider1, and Wolfram Weise1,2 — 1Technische Universität München — 2ECT∗, Trento
Dileptons are important probes in the context of heavy ion collisions,
as they do not thermalize but rather escape at all stages of
the fireball evolution, therefore providing a window to
the early conditions where the quark-gluon plasma (QGP)
presumably exists.
Using a thermodynamically self-consistent model for the fireball
created in a heavy ion collision, we calculate the emission
of dilepton radiation during the fireball evolution and compare to
SPS 40 and 160 AGeV data. For the QGP phase of the evolution, we
use a quasiparticle model to obtain the thermal spectral function
which determines the dilepton rate.
In the hadronic phase, the spectral function
is calculated using an improved vector meson dominance model
combined with chiral dynamics. We find good agreement to the data.
Predictions for the PHENIX experiment at RHIC are also given.
Work supported in part by BMBF and GSI.