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First study of the radiation-amplitude zero in W gamma production and limits on anomalous WW gamma couplings at root s=1.96 TeV
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2008 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 100, no 24, 241805Article in journal (Refereed) Published
Abstract [en]

We present results from a study of p (p) over bar -> W gamma+X events utilizing data corresponding to 0.7 fb(-1) of integrated luminosity at root s = 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We set limits on anomalous WW gamma couplings at the 95% C.L. The one-dimensional 95% C.L. limits are 0.49 <kappa(gamma)< 1.51 and -0.12 <lambda(gamma)< 0.13. We make the first study of the charge-signed rapidity difference between the lepton and the photon and find it to be indicative of the standard model radiation-amplitude zero in the W gamma system.

Place, publisher, year, edition, pages
2008. Vol. 100, no 24, 241805
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Physical Sciences
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URN: urn:nbn:se:uu:diva-260398DOI: 10.1103/PhysRevLett.100.241805ISI: 000256942400021PubMedID: 18643574OAI: oai:DiVA.org:uu-260398DiVA: diva2:846997
Available from: 2015-08-18 Created: 2015-08-18 Last updated: 2017-12-04Bibliographically approved

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