par Abulencia, A.;De Lentdecker, Gilles 
; [et al.]
Référence Physical review letters, 98, 16, 161801
Publication Publié, 2007
; [et al.]Référence Physical review letters, 98, 16, 161801
Publication Publié, 2007
Article révisé par les pairs
| Résumé : | We report the first observation of the associated production of a W boson and a Z boson. This result is based on 1.1fb-1 of integrated luminosity from pp̄ collisions at s=1.96TeV collected with the CDF II detector at the Fermilab Tevatron. We observe 16 WZ candidates passing our event selection with an expected background of 2.7±0.4 events. A fit to the missing transverse energy distribution indicates an excess of events compared to the background expectation corresponding to a significance equivalent to 6 standard deviations. The measured cross section is σ(pp̄→WZ)=5.0-1.6+1.8pb, consistent with the standard model expectation. © 2007 The American Physical Society. |
