Limits on Anomalous $WWγ$ Couplings from $p\bar{p} \to W γ+ X$ Events at $\sqrt{s}=1.8$ TeV

Details Limits on Anomalous $WWγ$ Couplings from $p\bar{p} \to W γ+ X$ Events at $\sqrt{s}=1.8$ TeV Limits on Anomalous $WWγ$ Couplings from $p\bar{p} \to W γ+ X$ Events at $\sqrt{s}=1.8$ TeV

1996-12-04

arxiv.org/abs/hep-ex/9612002v1

Phys.Rev.Lett.78:3634-3639,1997

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, including two figures. Paper submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.78.3634

We have measured the $WW\gamma$ gauge boson coupling parameters using $p\bar{p}\to \ell\nu\gamma+X$ ($\ell=e,\mu$) events at $\sqrt{s}=1.8$ TeV. The data, corresponding to an integrated luminosity of 89.1 pb^{-1}, were collected using the D0 detector at the Fermilab Tevatron Collider. The measured cross section times branching ratio for $p\bar{p} \to W\gamma+X$ with $p_T^\gamma$ > 10 GeV/c and $R_{\ell\gamma} > 0.7$ is ${11.8}^{+1.7}_{-1.6} \pm 2.0$ pb, in agreement with the Standard Model prediction. The one degree of freedom 95% confidence level limits on individual CP-conserving parameters are $-0.98<\Delta\kappa<1.01$ and $-0.33<\lambda<0.31$. Similar limits are set on the CP}violating coupling parameters.

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