Determination of the strong coupling constant from the CLEO measurement of the total hadronic cross section in e{sup +}e{sup -} annihilation below 10.56 GeV
- Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)
- Switzerland
- Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX (United Kingdom)
Using recent CLEO III results for the cross section for e{sup +}e{sup -}{yields}hadrons at seven center-of-mass energies between 6.964 and 10.538 GeV, we derive a value for the strong coupling constant {alpha}{sub s}(M{sub Z}{sup 2})=0.110{sub -0.012-0.011}{sup -0.010+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 flavors. 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 {alpha}{sub s}(M{sub Z}{sup 2})=0.119{sub -0.011}{sup +0.009}, well consistent with the current world average.
- OSTI ID:
- 21032330
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 7; Other Information: DOI: 10.1103/PhysRevD.76.074003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental study of the reactions e/sup +/e/sup -/. -->. e/sup +/e/sup -/ and e/sup +/e/sup -/. --> gamma gamma. at 29 GeV
Inclusive D sup 0 production in e sup + e sup minus annihilation at 29 GeV