Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging
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Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging

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Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging

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DELPHI Collaboration; Cases Ruiz, Ramón; Castillo Giménez, María Victoria Perfil; Higón Rodríguez, Emilio Perfil; Ferrer Soria, Antonio Perfil; Chrin, J. T. M.; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Hernando Morata, José Ángel; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martínez Vidal, Fernando Perfil; Martí García, Salvador; Navas Concha, Sergio; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio
This document is a artículoDate1995

Este documento está disponible también en : http://hdl.handle.net/10550/34919
Two measurements of Γbb¯/Γhad are presented. Both measurements use 250000Z decays taken with the DELPHI detector in 1991 and rely mainly on the precision of the microvertex detector. One tagging method is as simple as possible so that background rates can be reliably predicted by simulation. The other one uses a more involved tagging technique and reduces the dependence on simulation as much as possible. Combining both results, Γbb¯/Γhad is found to be 0.2209±0.0041(stat.)±0.0042(syst.)±0.0018 Γcc¯ .

    DELPHI Collaboration Cases Ruiz, Manuel Ramón Castillo Giménez, María Victoria Higón Rodríguez, Emilio Ferrer Soria, Antonio 1995 Measurement of the Gamma (b anti-b) / Gamma (hadron) branching ratio of the Z by double hemisphere tagging Zeitschrift für Physik C-Particles and Fields 65 4 555 568
http://dx.doi.org/10.1007/BF01578666

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