Determination of alpha-s in second order QCD from hadronic Z decays
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Determination of alpha-s in second order QCD from hadronic Z decays

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Determination of alpha-s in second order QCD from hadronic Z decays

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DELPHI Collaboration; Allen, Paul; Castillo Giménez, María Victoria Perfil; Fez Laso, M. D. M. de; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Lozano Bahilo, José Julio; Lacasta Llácer, Carlos; Martí García, Salvador; Salt Cairols, José Perfil; Sánchez Rojo, María Ester; Valls Ferrer, Juan Antonio; Zúñiga Román, Juan
This document is a artículoDate1992

Este documento está disponible también en : http://hdl.handle.net/10550/53842
Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant alpha(s) are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, alpha(s) (M(Z)) = 0.113 +/- 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model.

    DELPHI Collaboration Allen, Paul Castillo Giménez, María Victoria Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lozano Bahilo, José Julio Lacasta Llácer, Carlos Martí García, Salvador Salt Cairols, José Sánchez Rojo, María Ester Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1992 Determination of alpha-s in second order QCD from hadronic Z decays Zeitschrift für Physik C-Particles and Fields 54 1 55 73
http://dx.doi.org/10.1007/BF01881708

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