| Jahr | 2000 |
| Autor(en) | R. Barate et al. |
| Titel | Measurement of the and B- Meson Lifetimes |
| KIP-Nummer | HD-KIP 00-105 |
| KIP-Gruppe(n) | ALEPH |
| Dokumentart | Paper |
| Quelle | Physics Letters B Volume 492, Issues 3-4, 2000, Pages 275-287 |
| Abstract (de) | The lifetimes of the B0 and B mesons are measured using a sample of about four million hadronic Z decays collected from 1991 to 1995 with the ALEPH detector at LEP. The data sample has been recently reprocessed, achieving a substantial improvement in the tracking performance. Semileptonic decays of Image and previous B0 mesons are partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the previous B meson is estimated from the measured decay length and the momentum of the D-lepton system. A fit to the proper time of 1880 D*+ and 2856 D0 candidates yields the following results: τB0=1.518±0.053±0.034 ps, τB-=1.648±0.049±0.035 ps, τB0 / τB-= 1.085±0.059±0.018. |
| Abstract (en) | The lifetimes of the B0 and B mesons are measured using a sample of about four million hadronic Z decays collected from 1991 to 1995 with the ALEPH detector at LEP. The data sample has been recently reprocessed, achieving a substantial improvement in the tracking performance. Semileptonic decays of Image and previous B0 mesons are partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the previous B meson is estimated from the measured decay length and the momentum of the D-lepton system. A fit to the proper time of 1880 D*+ and 2856 D0 candidates yields the following results: |
| URL | link |
