Thermal Dilepton Radiation at Intermediate Masses at the CERN-SpS

Details Thermal Dilepton Radiation at Intermediate Masses at the CERN-SpS Thermal Dilepton Radiation at Intermediate Masses at the CERN-SpS

1999-09-13

arxiv.org/abs/hep-ph/9909348v2

Phys.Lett. B473 (2000) 13-19

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages ReVTeX including 4 eps-figures

Scientific paper

10.1016/S0370-2693(99)01367-2

We investigate the significance of thermal dilepton radiation in the intermediate-mass region in heavy-ion reactions at CERN-SpS energies. Within a thermal fireball model for the space-time evolution, the radiation from hot matter is found to dominate over hard 'background' processes (Drell-Yan and open charm) up to invariant masses of about 2 GeV, with a rather moderate fraction emerging from early stages with temperatures $T\simeq 175-200$ MeV associated with deconfined matter. Further including a schematic acceptance for the NA50 experiment we find good agreement with the observed enhancement in the region 1.5 GeV~$

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