Huovinen, Pasi and Ruuskanen, P. V. and Sollfrank, Josef (1999) Sensitivity of electromagnetic spectra to equation of state and initial energy density in the Pb+Pb collisions at SPS. NUCLEAR PHYSICS A, 650 (2). pp. 227-244. ISSN 0375-9474,
Full text not available from this repository.Abstract
We study Pb + Pb collisions at 158A GeV/c using a hydrodynamical approach. We test different equations of state (EoSs) and different initial conditions and show that there are more than one initial state for each EoS which reproduce the observed hadronic spectra, We also find that different equations of state favor different freeze-out temperature. Simultaneously we calculate the thermal dilepton and photon spectra for each EoS and initial state, We compare the dilepton mass spectrum to data measured by the CERES collaboration and find that the differences in spectra obtained using different EoSs and initial states are not resolvable within the current experimental resolution. However, at invariant masses over 2 GeV the difference in the yield due to various initial states is close to an order of magnitude, We also study the rapidity distribution of lepton pairs and find that for masses around 800 MeV the shape of the distribution depends strongly on the EoS, (C) 1999 Elsevier Science B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; SUPER PROTON SYNCHROTRON; HADRON PHASE-TRANSITION; QUARK-GLUON PLASMA; MASS DILEPTON PRODUCTION; THERMAL PHOTON-EMISSION; PB-AU COLLISIONS; S+AU COLLISIONS; 200A GEV; ultrarelativistic heavy-ion collisions; hydrodynamical description; electromagnetic spectra |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Nov 2022 10:28 |
| Last Modified: | 08 Nov 2022 10:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48333 |
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