Determination of alpha(s) from the scaling violation in the fragmentation functions in e+e- annihilation
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Determination of alpha(s) from the scaling violation in the fragmentation functions in e+e- annihilation

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Determination of alpha(s) from the scaling violation in the fragmentation functions in e+e- annihilation

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DELPHI Collaboration; Allen, Paul; Chrin, J. T. M.; Castillo Giménez, María Victoria Perfil; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; Fez Laso, M. D. M. de; Gómez Cadenas, Juan José Perfil; García García, Carmen Perfil; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martí García, Salvador; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio; Zúñiga Román, Juan
Aquest document és un/a article, creat/da en: 1993
A determination of the hadronic fragmentation functions of the Z0 boson is presented from a study of the inclusive hadron production with the DELPHI detector at LEP. These fragmentation functions were compared with the ones at lower energies, thus covering data in a large kinematic range: 196 less-than-or-equal-to Q2 less-than-or-equal-to 8312 GeV2 and x (= p(h)/E(beam)) > 0.08. A large scaling violation was observed, which was used to extract the strong coupling constant in second order QCD: alpha(s)(M(Z)) = 0.118 +/- 0.005. The corresponding QCD scale for five quark flavours is: LAMBDA(MS)(5)BAR = 230 +/- 60 MeV.

    DELPHI Collaboration Allen, Paul Chrin, J. T. M. Castillo Giménez, María Victoria Cortina Gil, Eduardo Ferrer Soria, Antonio Fuster Verdú, Juan A. Fez Laso, M. D. M. de Gómez Cadenas, Juan José García García, Carmen Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Lozano Bahilo, José Julio Martí García, Salvador Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1993 Determination of alpha(s) from the scaling violation in the fragmentation functions in e+e- annihilation Physics Letters B 311 1-4 408 424
http://dx.doi.org/10.1016/0370-2693(93)90587-8
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