| Jahr | 2000 |
| Autor(en) | R. Barate et al. |
| Titel | A study of the decay width difference in the B0s - b0s system using φ φ correlations |
| KIP-Nummer | HD-KIP 00-116 |
| KIP-Gruppe(n) | ALEPH |
| Dokumentart | Paper |
| Quelle | Physics Letters B Volume 486, Issues 3-4, 3 August 2000, Pages 286-299 |
| Abstract (de) | In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the B0s→D(*)+sD(*)−s decay is observed, based on tagging the final state with two φ mesons in the same hemisphere. The Ds(*)+Ds(*)− final state is mostly CP even and corresponds to the short-lived B0s mass eigenstate. The branching ratio of this decay is measured to be BR(B0s(short) →D(*)+sD(*)−s) =(23±10 −9+19)%. A measurement of the lifetime of the B0s(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 B0s- b0ssystem, corresponding to an average value ΔΓ/Γ=(25+21−14)%. |
| Abstract (en) | In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the B0s→D(*)+sD(*)−s decay is observed, based on tagging the final state with two φ mesons in the same hemisphere. The Ds(*)+Ds(*)− final state is mostly CP even and corresponds to the short-lived B0s mass eigenstate. The branching ratio of this decay is measured to be BR(B0s(short) →D(*)+sD(*)−s) =(23±10 −9+19)%. A measurement of the lifetime of the B0s(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 B0s- b0ssystem, corresponding to an average value ΔΓ/Γ=(25+21−14)%. |
| URL | link |
