# Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV

Abstract : The PHENIX experiment has measured mid-rapidity transverse momentum spectra (0.4 < p_T < 4.0 GeV/c) of single electrons as a function of centrality in Au+Au collisions at sqrt(s_NN) = 200 GeV. Contributions to the raw spectra from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X_0) converter into the PHENIX acceptance and are statistically removed. The subtracted non-photonic'' electron spectra are primarily due to the semi-leptonic decays of hadrons containing heavy quarks (charm and bottom). For all centralities, charm production is found to scale with the nuclear overlap function, T_AA. For minimum-bias collisions the charm cross section per binary collision is N_cc^bar/T_AA = 622 +/- 57 (stat.) +/- 160 (sys.) microbarns.
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http://hal.in2p3.fr/in2p3-00023548
Contributor : Sylvie Flores <>
Submitted on : Tuesday, January 11, 2005 - 12:25:46 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:07 PM

### Citation

S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV. Physical Review Letters, American Physical Society, 2005, 94, pp.082301-6. ⟨10.1103/PhysRevLett.94.082301⟩. ⟨in2p3-00023548⟩

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