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 (p) over bar collisions at root 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 sigma(p (p) over bar -> WZ)=(5.0 + (-1.6)(+1.8)) pb, consistent with the standard model expectation.

A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2007). Observation of WZ production. PHYSICAL REVIEW LETTERS, 98, 161801-1-161801-7 [10.1103/PhysRevLett.98.161801].

Observation of WZ production

CIOCCI, MARIA AGNESE;
2007-01-01

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 (p) over bar collisions at root 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 sigma(p (p) over bar -> WZ)=(5.0 + (-1.6)(+1.8)) pb, consistent with the standard model expectation.
2007
A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2007). Observation of WZ production. PHYSICAL REVIEW LETTERS, 98, 161801-1-161801-7 [10.1103/PhysRevLett.98.161801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/36626
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