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Centrality dependence of charm production from a measurement of single electrons in Au + Au collisions at √SNN = 200 GeV

  • S. S. Adler
  • , S. Afanasiev
  • , C. Aidala
  • , N. N. Ajitanand
  • , Y. Akiba
  • , J. Alexander
  • , R. Amirikas
  • , L. Aphecetche
  • , S. H. Aronson
  • , R. Averbeck
  • , T. C. Awes
  • , R. Azmoun
  • , V. Babintsev
  • , A. Baldisseri
  • , K. N. Barish
  • , P. D. Barnes
  • , B. Bassalleck
  • , S. Bathe
  • , S. Batsouli
  • , V. Baublis
  • A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. G. D'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, R. Du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier De Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. Å Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, T. A. Shibata
  • Brookhaven National Laboratory
  • Joint Institute for Nuclear Research
  • Stony Brook University
  • High Energy Accelerator Research Organization, Tsukuba
  • RIKEN
  • Florida State University
  • SUBATECH
  • Oak Ridge National Laboratory
  • Institute for High Energy Physics
  • CEA Saclay
  • University of California at Riverside
  • Los Alamos National Laboratory
  • University of New Mexico
  • University of Münster
  • Columbia University
  • Petersburg Nuclear Physics InstituteGatchina
  • Brookhaven National Lab
  • Iowa State University
  • Peter the Great St. Petersburg Polytechnic University
  • CNRS-IN2P3
  • New Mexico State University
  • Lawrence Livermore National Laboratory
  • Korea Atomic Energy Research Institute
  • Homi Bhabha National Institute
  • Academia Sinica - Institute of Physics
  • Yonsei University
  • Gangneung-Wonju National University
  • Universidade de São Paulo
  • Lund University
  • Vanderbilt University
  • Hiroshima University
  • University of Tsukuba
  • Russian Research Centre Kurchatov Institute
  • Weizmann Institute of Science
  • University of Tennessee
  • The University of Tokyo
  • Institute of Science Tokyo

Research output: Contribution to journalArticlepeer-review

254 Scopus citations

Abstract

The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4 < pT < 4.0 GeV/c) of single electrons as a function of centrality in Au + Au collisions at √SNN = 200 GeV. Contributions from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X0) converter into the PHENIX acceptance and are statistically removed. The subtracted nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons containing heavy quarks, mainly charm at lower pT. For all centralities, the charm production cross section is found to scale with the nuclear overlap function, TAA. For minimum-bias collisions the charm cross section per binary collision is Ncc̄/TAA = 622 ± 57(stat) ± 160(syst) μb.

Original languageEnglish
Article number082301
Pages (from-to)1-6
Number of pages6
JournalPhysical Review Letters
Volume94
Issue number8
DOIs
StatePublished - Mar 4 2005

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