The measurement of R at CLEO

The measurement of R at CLEO

Measurements of the total cross section of e+e- -> hadrons are presented in two different ranges of centre-of-mass energy. The measurements are made using the CLEO III and CLEO-c detectors at the Cornell Electron Storage Ring. The absolute cross sections and the values of R, the ratio of hadronic...

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Veröffentlicht in:arXiv.org 2008-07
Hauptverfasser: Collaboration, CLEO, Libby, Jim
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Charm (particle physics)
Cross-sections
Hadrons
Mesons
Pair production
Physics - High Energy Physics - Experiment
Storage rings (particle accelerators)
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description Measurements of the total cross section of e+e- -> hadrons are presented in two different ranges of centre-of-mass energy. The measurements are made using the CLEO III and CLEO-c detectors at the Cornell Electron Storage Ring. The absolute cross sections and the values of R, the ratio of hadronic to muon pair production cross sections, are determined at seven centre-of-mass energies between 6.964 and 10.538 GeV. The total cross sections and values of R are also determined at thirteen centre-of-mass energies between 3.97 and 4.26 GeV; in addition, the inclusive and exclusive cross sections for D+, D0 and Ds+ production are presented. Furthermore, for the lower centre-of-mass energy range, exclusive cross-sections are presented for final states consisting of two charm mesons: DDbar, D*Dbar, DDbar*, D*Dbar*, Ds+Ds-, Ds*+Ds-, Ds+Ds*-, DDbar*pi and D*Dbar*pi.
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subjects Charm (particle physics)
Cross-sections
Hadrons
Mesons
Pair production
Physics - High Energy Physics - Experiment
Storage rings (particle accelerators)
title The measurement of R at CLEO
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