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Wγ Production and Limits on Anomalous WWγ Couplings in pp̅ Collisions at √s=1.96  TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 107, 241803- p.Article in journal (Refereed) Published
Abstract [en]

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→lν)+γ production in eγ and μγ 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 measured cross section times branching fraction for the process pp̅ →Wγ+X→lνγ+X 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 WWγ couplings for data from hadron colliders: -0.4<Δκγ<0.4 and -0.08<λγ<0.07 at the 95% C.L.

Place, publisher, year, edition, pages
2011. Vol. 107, 241803- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-65789DOI: 10.1103/PhysRevLett.107.241803ISI: 000297939300004OAI: diva2:464714
Swedish Research Council

authorCount :421

Available from: 2011-12-13 Created: 2011-12-13 Last updated: 2012-12-05Bibliographically approved

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Åsman, Barbro
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