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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
University of Chicago.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 534
2008 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 100, no 24, 241805- p.Article 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- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-47308DOI: 10.1103/PhysRevLett.100.241805ISI: 000256942400021OAI: diva2:454709
QC 20111108 Author Count: 534Available from: 2011-11-08 Created: 2011-11-08 Last updated: 2012-02-01Bibliographically approved

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Gollub, NilsStrandberg, Jonas
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