Measurement of the inclusive b→τνX branching ratio

doi:10.1016/0370-2693(94)90880-X

Physics Letters B

Volume 332, Issues 1–2, 14 July 1994, Pages 201-208

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Abstract

Using the L3 detector, the branching ratio BR(b → πνX) has been measured using a sample of Z → b $b$ events tagged by high momentum and high transverse momentum leptons in one hemisphere and with missing energy in the opposite hemisphere. From a sample of 948 000 hadronic events we find BR(b → πνX) = (2.4 ± 0.7 (stat.) ± 0.8 (syst.))%.

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¹: Supported by the German Bundesministerium für Forschung und Technologie.

²: Supported by the Hungarian OTKA fund under contract number 2970.

³: Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina.