Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-10-11
Phys.Rev. D51 (1995) 3381-3407
Physics
High Energy Physics
High Energy Physics - Phenomenology
REVTEX3 file, 51 pages, 21 figures (postscript files) can be obtained via anonymous ftp://ucdhep.ucdavis.edu/anonymous/ohnemus
Scientific paper
10.1103/PhysRevD.51.3381
The process $p\,\pbar \rightarrow W^{\pm}Z + X \rightarrow \ell^\pm_1 \nu_1 \ell_2^+ \ell_2^- + X$ is calculated to ${\cal O}(\alpha_s)$ for general $C$ and $P$ conserving $WWZ$ couplings. At the Tevatron center of mass energy, the QCD corrections to $WZ$ production are modest. At Large Hadron Collider (LHC) energies, the inclusive QCD corrections are large, but can be reduced significantly if a jet veto is imposed. Sensitivity limits for the anomalous $WWZ$ couplings are derived from the next-to-leading order $Z$ boson transverse momentum distribution for Tevatron and LHC energies. Unless a jet veto is imposed, next-to-leading order QCD corrections decrease the sensitivity to anomalous $WWZ$ couplings considerably at LHC energies, but have little influence at the Tevatron. We also study, at next-to-leading order, rapidity correlations between the $W$ and $Z$ decay products, and the $ZZ/WZ$ and $WZ/W\gamma$ cross section ratios. These quantities are found to be useful tools in searching for the approximate zero present in the Standard Model $WZ$ helicity amplitudes. The prospects for observing the approximate amplitude zero at the Tevatron and the LHC are critically assessed.
Baur Uli
Han Tao
Ohnemus J.
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