Article
Dilepton mass spectra in p plus p collisions at root s=200 GeV and the contribution from open charm
Physics Letters B
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
1-5-2009
DOI
10.1016/j.physletb.2008.10.064
Abstract
PHENIX has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c(2) in p + p collisions at root s = 200 GeV. The contributions from light meson decays to e(+)e(-) pairs have been determined based on measurements of hadron production cross sections by PHENIX. Within the systematic uncertainty of similar to 20% they account for all e(+)e(-) pairs in the mass region below similar to 1 GeV/c(2). The e(+)e(-) pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) pb. which is consistent with QCD calculations and measurements of single leptons by PHENIX.
Creative Commons License
Creative Commons Attribution 4.0
Copyright Owner
Elsevier B.V.
Copyright Date
2008
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Nathan C. Grau, John C. Hill, John G. Lajoie, et al.. "Dilepton mass spectra in p plus p collisions at root s=200 GeV and the contribution from open charm" Physics Letters B Vol. 670 Iss. 4-5 (2009) p. 313 - 320 Available at: http://works.bepress.com/craig-ogilvie/144/
This is an article from Physics Letters B 670 (2009): 313, doi:10.1016/j.physletb.2008.10.064. Posted with permission.