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Enhanced production of low-mass electron-positron pairs in 40-AGeV Pb-Au collisions at the CERN SPS

  • D. Adamová
  • , G. Agakichiev
  • , H. Appelshäuser
  • , V. Belaga
  • , P. Braun-Munzinger
  • , A. Cherlin
  • , S. Damjanović
  • , T. Dietel
  • , L. Dietrich
  • , A. Drees
  • , S. I. Esumi
  • , K. Filimonov
  • , K. Fomenko
  • , Z. Fraenkel
  • , C. Garabatos
  • , P. Glässel
  • , G. Hering
  • , J. Holeczek
  • , V. Kushpil
  • , B. Lenkeit
  • A. Maas, A. Marín, J. Miloševic, A. Milov, D. Miśkowiec, Yu Panebrattsev, O. Petchenova, V. Petráček, A. Pfeiffer, J. Rak, I. Ravinovich, P. Rehak, M. Richter, H. Sako, W. Schmitz, S. Sedykh, W. Seipp, A. Sharma, S. Shimansky, J. Slívová, H. J. Specht, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, J. P. Wessels, T. Wienold, B. Windelband, J. P. Wurm, W. Xie, S. Yurevich, V. Yurevich
  • Czech Academy of Sciences
  • GSI Helmholtz Centre for Heavy Ion Research
  • Heidelberg University 
  • Joint Institute for Nuclear Research
  • Weizmann Institute of Science
  • CERN
  • Max Planck Institute for Nuclear Physics
  • Brookhaven National Laboratory

Research output: Contribution to journalArticlepeer-review

137 Scopus citations

Abstract

An overview is given of the results on the production of e+e- pairs for Pb-Au collisions at the SPS beam energy of 40 AGeV, where a lower temperature and a higher baryon density are expected as compared to 158 AGeV. The enhancement factor relative to the expectation from meson decays is shown to be 5.9±1.5(stat)±1.2(syst data)±1.8(syst decays).

Original languageEnglish
Article number042301
Pages (from-to)042301/1-042301/5
JournalPhysical Review Letters
Volume91
Issue number4
StatePublished - Jul 25 2003

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