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Phys. Rev. C 60, 017901 (1999) [3 pages]

Reexamining lepton pairs at ultrarelativistic energies

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J. Murray
Department of Physics, Linfield College, McMinnville, Oregon 97128

W. Bauer
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

K. Haglin
Department of Physics and Astronomy, St. Cloud State University, St. Cloud, Minnesota 56301

Received 28 October 1998; published 16 June 1999

We confirm the importance of standard medium effects (hadronic rescattering) in heavy-ion collisions by using a perturbative-QCD-motivated hadronic model to investigate the dilepton spectra from Pb+Au collisions at 158 GeV/nucleon. These same effects, namely, prompt πρ→πe+e-, have been studied in several CERN SPS systems [J. Murray, W. Bauer, and K. Haglin, Phys. Rev. C 57, 882 (1998)]. The results presented here are consistent with previous studies stating that this type of rescattering effect explains a portion of the “excess” lepton pairs seen by the CERES experiment, but not the entire effect.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.60.017901
DOI: 10.1103/PhysRevC.60.017901
PACS: 25.75.-q, 12.38.Mh, 24.85.+p, 24.10.Lx

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