Measurement of A(FB)(b anti-b) in hadronic Z decays using a jet charge technique
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Measurement of A(FB)(b anti-b) in hadronic Z decays using a jet charge technique

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Measurement of A(FB)(b anti-b) in hadronic Z decays using a jet charge technique

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DELPHI Collaboration; Alemany Fernández, Reyes; Cabrera Urbán, Susana Perfil; Castillo Giménez, María Victoria Perfil; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gil Botella, Inés; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Martínez Vidal, Fernando Perfil; Navas Concha, Sergio; Salt Cairols, José Perfil
Aquest document és un/a article, creat/da en: 1999

Este documento está disponible también en : http://dx.doi.org/10.1007/s100520050030
The b {b} forward-backward asymmetry has been determined from the average charge flow measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992-1995. The measurement is performed in an enriched b {b} sample selected using an impact parameter tag and results in the following values for the b {b} forward-backward asymmetry: AFBb\overline{b} (89.55 GeV) = 0.068 ± 0.018 (stat.)± 0.0013(syst.) AFBb\overline{b} (91.26 GeV) = 0.0982±0.0047(stat.)±0.0016(syst.) AFBb\overline{b} (92.94 GeV) = 0.123 ± 0.016 (stat.)± 0.0027(syst.) The b {b} charge separation required for this analysis is directly measured in the b tagged sample, while the other charge separations are obtained from a fragmentation model precisely calibrated to data. The effective weak mixing angle is deduced from the measurement to be: sin2θeffl= 0.23186±0.00083

    DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Martínez Vidal, Fernando Navas, S. Salt Cairols, José 1999 Measurement of A(FB)(b anti-b) in hadronic Z decays using a jet charge technique European Physical Journal C 9 367 381
http://dx.doi.org/10.1007/s100520050030
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