Measurement of the $p$ - $\bar p \to W \gamma$ + $X$ cross section at $\sqrt s $ 1.96-TeV and $W W \gamma$ anomalous coupling limits

D0 Collaboration

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    Abstract

    The WWgamma triple gauge boson coupling parameters are studied using p-pbar -> l nu gamma + X (l = e,mu) events at sqrt(s) = 1.96 TeV. The data were collected with the DO detector from an integrated luminosity of 162 pb^{-1} delivered by the Fermilab Tevatron Collider. The cross section times branching fraction for p-pbar -> W(gamma) + X -> l nu gamma + X with E_T^{gamma} > 8 GeV and Delta R_{l gamma} > 0.7 is 14.8 +/- 1.6 (stat) +/- 1.0 (syst) +/- 1.0 (lum) pb. The one-dimensional 95% confidence level limits on anomalous couplings are -0.88 < Delta kappa_{gamma} < 0.96 and -0.20 < lambda_{gamma} < 0.20.
    Original languageEnglish
    Article number91108
    Number of pages7
    JournalPhys. Rev.
    VolumeD71
    Publication statusPublished - 2005

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