Dilepton mass spectra in p plus p collisions at root s=200 GeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F09%3A00206781" target="_blank" >RIV/00216208:11320/09:00206781 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Dilepton mass spectra in p plus p collisions at root s=200 GeV
Original language description
: 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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
<a href="/en/project/LA08015" target="_blank" >LA08015: Collaboration of the Czech Republic with CERN</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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