Adler, S. S. ; Kapoor, S. S. ; et., al (2005) Centrality dependence of charm production from a measurement of single electrons in Au+Au collisions at √sNN=200 GeV Physical Review Letters, 94 (8). 082301_1-082301_6. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v94/i8/e082301
Related URL: http://dx.doi.org/10.1103/PhysRevLett.94.082301
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 Ncc-/TAA=622±57(stat)±160(syst) μb.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 16652 |
| Deposited On: | 15 Nov 2010 13:30 |
| Last Modified: | 03 Jun 2011 11:40 |
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