Observation of $W Z$ Production

19 April 2007

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 98 (16) , 161801
https://doi.org/10.1103/physrevlett.98.161801

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

p \bar{p}

collisions at

\sqrt{s} = 1.96 TeV

collected with the CDF II detector at the Fermilab Tevatron. We observe 16

W Z

candidates passing our event selection with an expected background of

2.7 \pm 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 (p \bar{p} \to W Z) = {5.0}_{- 1.6}^{+ 1.8} pb

, consistent with the standard model expectation.

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Version 1, 2007-02-18, ArXiv

This publication has 18 references indexed in Scilit:

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Observation ofWZProduction

Abstract

Keywords

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Observation of $W Z$ Production