Determination of the strong coupling constant from the CLEO measurement of the total hadronic cross section in $e^+e^-$ annihilation below 10.56 GeV

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dc.creatorKuhn, Johann H.
dc.creatorSteinhauser, Matthias
dc.creatorTeubner, Thomas
dc.date2007-07-17
dc.date.accessioned2026-07-07T10:56:46Z
dc.date.available2026-07-07T10:56:46Z
dc.descriptionUsing recent CLEO III results for the cross section for $e^+e^- \to {\rm hadrons}$ at seven centre-of-mass energies between 6.964 and 10.538 GeV, we derive a value for the strong coupling constant $α_s(M_Z^2)=0.110_{-0.012}^{-0.010}{}_{-0.011}^{+0.010}$ where the uncertainties are uncorrelated and correlated, respectively. Our result differs significantly from the one derived by CLEO III, as a consequence of inclusion of quark mass effects and the proper matching between the effective theories with four and five flavours. Combining this new result with an analysis based on earlier cross section measurements in the energy region between 2 and 10.6 GeV, we obtain $α_s(M_Z^2)=0.119^{+0.009}_{-0.011}$, well consistent with the current world average.
dc.description7 pages
dc.identifierhttps://arxiv.org/abs/0707.2589
dc.identifierhttp://arxiv.org/abs/0707.2589
dc.identifierPhys.Rev.D76:074003,2007
dc.identifierdoi:10.1103/PhysRevD.76.074003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186528
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDetermination of the strong coupling constant from the CLEO measurement of the total hadronic cross section in $e^+e^-$ annihilation below 10.56 GeV
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