| Jahr | 2000 |
| Autor(en) | R. Barate et al. |
| Titel | Measurement of the W-pair production in e+e- Collisions at 189 GeV |
| KIP-Nummer | HD-KIP 00-115 |
| KIP-Gruppe(n) | ALEPH |
| Dokumentart | Paper |
| Quelle | Physics Letters B Volume 484, Issues 3-4, 6 July 2000, Pages 205-217 |
| Abstract (de) | The production of W+W− pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb−1. Cross sections are given for different topologies of W decays into leptons or hadrons. Combining all final states and assuming Standard Model branching fractions, the total W-pair cross section is measured to be 15.71±0.34(stat.)±0.18(syst.) pb. Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching fraction of the W boson into hadrons is measured to be B(W→hadrons)=66.97±0.65(stat.)±0.32(syst.)%, allowing a determination of the CKM matrix element |Vcs|=0.951±0.030(stat.)±0.015(syst.). |
| Abstract (en) | The production of W+W− pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb−1. Cross sections are given for different topologies of W decays into leptons or hadrons. Combining all final states and assuming Standard Model branching fractions, the total W-pair cross section is measured to be 15.71±0.34(stat.)±0.18(syst.) pb. Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching fraction of the W boson into hadrons is measured to be B(W→hadrons)=66.97±0.65(stat.)±0.32(syst.)%, allowing a determination of the CKM matrix element |Vcs|=0.951±0.030(stat.)±0.015(syst.). |
| URL | link |
