A Study of the decay width difference in the system using correlations
Feb, 200020 pages
Published in:
- Phys.Lett.B 486 (2000) 286-299
Report number:
- CERN-EP-2000-036
Experiments:
View in:
Citations per year
Abstract: (Elsevier)
In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the B 0 s →D (∗)+ s D (∗)− s decay is observed, based on tagging the final state with two φ mesons in the same hemisphere. The D s (∗)+ D s (∗)− final state is mostly CP even and corresponds to the short-lived B 0 s mass eigenstate. The branching ratio of this decay is measured to be BR (B 0 s ( short ) →D (∗)+ s D (∗)− s ) =(23±10 −9 +19 )% . A measurement of the lifetime of the B 0 s (short) gives 1.27±0.33±0.08 ps. The lifetime and branching ratio measurements provide two essentially independent methods of estimating the relative decay width difference ΔΓ / Γ in the B 0 s – B ̄ 0 s system, corresponding to an average value ΔΓ / Γ =(25 +21 −14 )%.- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- B/s0: hadronic decay
- anti-B/s0: hadronic decay
- charmed meson: pair production
- D/s*(2110): radiative decay
- D/s: hadronic decay
- correlation: (2Phi(1020))
References(20)
Figures(0)