Article
Centrality dependence of charm production from a measurement of single electrons in Au plus Au collisions at root s(NN)=200 GeV
Physical Review Letters
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
3-1-2005
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.
Copyright Owner
American Physical Society
Copyright Date
2005
Language
en
File Format
application/pdf
Citation Information
S. S. Adler, Sergey Belikov, S. Bhagavatula, Paul Constantin, et al.. "Centrality dependence of charm production from a measurement of single electrons in Au plus Au collisions at root s(NN)=200 GeV" Physical Review Letters Vol. 94 Iss. 8 (2005) p. 082301 Available at: http://works.bepress.com/craig-ogilvie/126/
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.