Thermal dileptons from quark and hadron phases of an expanding fireball |
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Authors: | R.A. Schneider W. Weise |
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Affiliation: | Physik-Department, Technische Universit?t München,D-85747 Garching, Germany, DE
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Abstract: | A fireball model with time evolution based on transport calculations is used to examine the dilepton emission rate of an ultra-relativistic heavy-ion collision. A transition from hadronic matter to a quark-gluon plasma at a critical temperature T C between 130-170 MeV is assumed. We also consider a possible mixed phase scenario. We include thermal corrections to the hadronic spectra below T C and use perturbation theory above T C. The sensitivity of the spectra with respect to the freeze-out temperature, the initial fireball temperature and the critical temperature is investigated. Received: 4 August 2000 / Accepted: 14 November 2000 |
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Keywords: | PACS. 12.38.Mh Quark-gluon plasma – 11.10.Wx Finite-temperature field theory |
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