2018 Impact factor 4.843
Particles and Fields

Eur. Phys. J. C 20, 455-478 (2001)
DOI: 10.1007/s100520100690

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

The DELPHI Collaboration P. Abreu and et al.

LIP, IST, FCUL - Av. Elias Garcia, 14-$1^{o}$, 1000 Lisboa Codex, Portugal

(Received: 3 March 2000 / Revised version: 23 April 2001 / Published online: 28 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
The semileptonic branching fractions for primary and cascade b decays , and 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 was also extracted. The following results have been obtained:

© Società Italiana di Fisica, Springer-Verlag 2001