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Leptonic and charged kaon decay modes of the meson measured in heavy-ion collisions at the CERN super proton synchrotron

  • D. Adamová
  • , G. Agakichiev
  • , D. Antończyk
  • , H. Appelshäuser
  • , V. Belaga
  • , J. Bielčíková
  • , P. Braun-Munzinger
  • , O. Busch
  • , A. Cherlin
  • , S. Damjanovic
  • , T. Dietel
  • , L. Dietrich
  • , A. Drees
  • , S. I. Esumi
  • , K. Filimonov
  • , K. Fomenko
  • , Z. Fraenkel
  • , C. Garabatos
  • , P. Glässel
  • , G. Hering
  • J. Holeczek, G. Krobath, V. Kushpil, W. Ludolphs, A. Maas, A. Marín, J. Milošević, D. Miśkowiec, R. Ortega, Y. Panebrattsev, O. Petchenova, V. Petráček, S. Radomski, J. Rak, I. Ravinovich, P. Rehak, H. Sako, W. Schmitz, J. Schukraft, S. Sedykh, S. Shimansky, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, G. Tsiledakis, J. P. Wessels, T. Wienold, J. P. Wurm, S. Yurevich, V. Yurevich
  • Czech Academy of Sciences
  • GSI Helmholtz Centre for Heavy Ion Research
  • Goethe University Frankfurt
  • Joint Institute for Nuclear Research
  • Heidelberg University 
  • Max Planck Institute for Nuclear Physics
  • Weizmann Institute of Science
  • Brookhaven National Laboratory
  • CERN
  • University of Münster

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We report on results of a measurement of meson production in central Pb-Au collisions at Elab=158AGeV. For the first time in the history of high energy heavy-ion collisions, mesons were reconstructed both in the K+K- and the dilepton decay channels in the same experiment. This measurement yields rapidity densities near midrapidity, from the two decay channels, of 2.05±0.14(stat)±0.25(syst) and 2.04±0.49(stat)±0. 32(syst), respectively. The shape of the measured transverse momentum spectrum is also in close agreement in both decay channels. The data rule out a possible enhancement of the yield in the leptonic over the hadronic decay channel of a factor 1.6 or larger at the 95% C.L. This rules out the discrepancy reported in the literature between measurements of the hadronic and dimuon decay channels by two different experiments.

Original languageEnglish
Article number152301
JournalPhysical Review Letters
Volume96
Issue number15
DOIs
StatePublished - 2006

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