Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au + Au Collisions at √sNN = 200 GeV
Physical Review Letters Volume 94 Issue 8
Page 082301-1-082301-6
published_at 2005-03-02
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| File | |
| Title ( eng ) |
Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au + Au Collisions at √sNN = 200 GeV
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| Creator |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Kohama Takeshi
Nakamura Tomoaki
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| Source Title |
Physical Review Letters
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| Volume | 94 |
| Issue | 8 |
| Start Page | 082301-1 |
| End Page | 082301-6 |
| 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 Ncc̅/TAA = 622 ± 57(stat) ± 160(syst) μb.
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| Keywords |
heavy ion-nucleus reactions
charm particles
meson decay
semileptonic decays
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2005-03-02 |
| Rights |
Copyright (c) 2005 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.94.082301
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.94.082301
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