Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

3-2005

Journal or Book Title

Physical Review Letters

Volume

94

Issue

8

First Page

082301

DOI

10.1103/PhysRevLett.94.082301

Abstract

The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4 < p(T)<4.0 GeV/c) of single electrons as a function of centrality in Au+Au collisions at roots(NN) = 200 GeV. Contributions 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 nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons containing heavy quarks, mainly charm at lower p(T). For all centralities, the charm production cross section is found to scale with the nuclear overlap function, T-AA. For minimum-bias collisions the charm cross section per binary collision is N-c (c) over bar/T-AA=622+/-57(stat)+/-160(syst) mu b.

Comments

This article is published as Adler, S. S., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas et al. "Centrality Dependence of Charm Production from a Measurement of Single Electrons in A u+ A u Collisions at s N N= 200 G e V." Physical review letters 94, no. 8 (2005): 082301. DOI: 10.1103/PhysRevLett.94.082301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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