Measurement of the Z0 branching fraction to B quark pairs using the boosted sphericity product
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Measurement of the Z0 branching fraction to B quark pairs using the boosted sphericity product

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Measurement of the Z0 branching fraction to B quark pairs using the boosted sphericity product

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DELPHI Collaboration; Allen, Paul; Llosá Reig, Rafael; Benlloch Baviera, José María; 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
Aquest document és un/a article, creat/da en: 1992
From a sample of about 120 000 hadronic Z 0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of b b decays has been measured to be 0.219 ± 0.014 (stat)± 0.019 (syst). Using the DELPHI determination of the hadronic Z 0 width, this corresponds to a partial width τ b b = 378 ± 42 MeV (in good agreement with the standard model prediction of ∼-380 MeV). Combining this measurement with the determinations based on events with high p t leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 ± 1.2)%, consistent with previous determinations.

    DELPHI Collaboration Allen, Paul Llosá Reig, Rafael Benlloch Baviera, José María 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 Measurement of the Z0 branching fraction to B quark pairs using the boosted sphericity product Physics Letters B 281 3-4 383 393
http://dx.doi.org/10.1016/0370-2693(92)91159-7
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