# Measurement of the $p\bar{p}\to WZ + X$ cross section at $\sqrt{s}$=1.96 TeV and limits on WWZ trilinear gauge couplings

Abstract : We present measurements of the process $p\bar{p} \to WZ+X \to \ell^{\prime} \nu_{\ell^{\prime}} \ell \bar{\ell}$ at $\sqrt{s}=1.96$ TeV, where $\ell$ and $\ell^{\prime}$ are electrons or muons. Using 1 fb$^{-1}$ of data from the D0 experiment, we observe 13 candidates with an expected background of $4.5\pm0.6$ events and measure a cross section $\sigma(WZ)=2.7^{+1.7}_{-1.3}$ pb. From the number of observed events and the $Z$ boson transverse momentum distribution, we limit the trilinear $WWZ$ gauge couplings to $-0.17 \le \lambda_Z \le 0.21$ $(\Delta \kappa_Z = 0)$ at the 95% C.L. for a form factor scale $\Lambda=2$ TeV. Further, assuming that $\Delta g^Z_1 = \Delta\kappa_Z$, we find $-0.12 \le \Delta\kappa_Z \le 0.29$ $(\lambda_Z=0)$ at the 95% C.L. These are the most restrictive limits on the $WWZ$ couplings available to date.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00178310
Contributor : Lpsc Bibliotheque <>
Submitted on : Wednesday, October 10, 2007 - 4:31:01 PM
Last modification on : Wednesday, September 16, 2020 - 4:23:36 PM

### Citation

V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Measurement of the $p\bar{p}\to WZ + X$ cross section at $\sqrt{s}$=1.96 TeV and limits on WWZ trilinear gauge couplings. Physical Review D, American Physical Society, 2007, 76, pp.111104. ⟨10.1103/PhysRevD.76.111104⟩. ⟨in2p3-00178310⟩

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