Wgamma production and limits on anomalous WWgamma couplings in ppbar collisions

Details Wgamma production and limits on anomalous WWgamma couplings in ppbar collisions Wgamma production and limits on anomalous WWgamma couplings in ppbar collisions

2011-09-20

arxiv.org/abs/1109.4432v2

Phys. Rev. Lett. 107, 241803 (2011)

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 4 figures, submitted to PRL

Scientific paper

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W -> lnu+gamma production in egamma and mugamma final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider, the cross section multiplied by the branching fraction for the process ppbar -> Wgamma+X -> lnugamma+X, measured to be 15.8 +/- 0.8 (stat.) +/- 1.2 (syst.) pb, and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WWgamma couplings for data from hadron colliders: -0.4 < Delta kappa_gamma < 0.4 and -0.08 < lambda_gamma < 0.07 at the 95% C.L.

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