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Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays

  • P. Abreu et al.
  • The DELPHI Collaboration
Experimental physics

Abstract.

The semileptonic branching fractions for primary and cascade b decays \({\mathrm{BR}}(b\rightarrow \ell^-)\), \(\mathrm{BR}(b\rightarrow c\rightarrow \ell^+)\) and \(\mathrm{BR}(b\rightarrow\bar c\rightarrow \ell^-\) were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays using the lifetime information and various techniques were used to separate leptons from direct or cascade b decays. By fitting the momentum spectra of di-leptons in opposite jets, the average b mixing parameter \(\bar{\chi}\) was also extracted. The following results have been obtained:

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Keywords

Momentum Spectrum Lifetime Information DELPHI Experiment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • P. Abreu et al.
    • 1
  • The DELPHI Collaboration
  1. 1.LIP, IST, FCUL - Av. Elias Garcia, 14-1°, 1000 Lisboa Codex, Portugal PT

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