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

Collaboration, TD; Abachi, S; (1997) Limits on Anomalous $WWγ$ Couplings from $p\bar{p} \to W γ+ X$ Events at $\sqrt{s}=1.8$ TeV. Physical Review Letters , 78 (19) 3634 - 3639. 10.1103/PhysRevLett.78.3634. Green open access

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Abstract

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.

Type: Article
Title: Limits on Anomalous $WWγ$ Couplings from $p\bar{p} \to W γ+ X$ Events at $\sqrt{s}=1.8$ TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.78.3634
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.78.3634
Language: English
Additional information: © 1997 The American Physical Society
URI: https://discovery.ucl.ac.uk/id/eprint/1374820
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