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Observation of WZ Production

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 98, no. 16, p. 161801
Abstract We report the first observation of the associated production of a W boson and a Z boson. This result is based on 1.1  fb−1 of integrated luminosity from pp collisions at s√=1.96  TeV 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(pp→WZ)=5.0+1.8−1.6  pb, consistent with the standard model expectation.
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CDF COLLABORATION. Observation of WZ Production. In: Physical Review Letters, 2007, vol. 98, n° 16, p. 161801. https://archive-ouverte.unige.ch/unige:38407

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Deposited on : 2014-07-01

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