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Measurement of the p(p)over-bar -> WZ+X cross section at root s=1.96 TeV and limits on WWZ trilinear gauge couplings
Stockholm University, Faculty of Science, Department of Physics.
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2007 (English)In: Physical Review D, ISSN 1550-7998, Vol. 76, no 11, 111104- p.Article in journal (Refereed) Published
Abstract [en]

We present measurements of the process p (P) over bar -> WZ + X -> l 'nu(l ')l (l) over bar at root s = 1:96 TeV,where l and l ' are electrons or muons. Using 1 fb(-1) of data from the D0 experiment, we observe 13 candidates with an expected background of 4.5 +/- 0.6 events and measure a cross section sigma(WZ) = 2.7(-1.3)(+1.7) pb. From the number of observed events and the Z boson transverse momentum distribution, we limit the trilinear WWZ gauge couplings to -0: 17 <= lambda(Z) <= 0.21 (Delta k(Z) <= 0.29(lambda(Z) = 0) at the 95% C.L. for a form factor scale Lambda = 2 TeV. Further, assuming that Delta g(1)(Z) = Delta k(Z), we find -0.12 <= Delta k(Z) <= 0.29(lambda(Z) = 0) at the 95% C. L. These are the most restrictive limits on the WWZ couplings available to date.

Place, publisher, year, edition, pages
2007. Vol. 76, no 11, 111104- p.
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-55272DOI: 10.1103/PhysRevD.76.111104ISI: 000251987200004OAI: diva2:406643
authorCount :557Available from: 2011-03-28 Created: 2011-03-07 Last updated: 2011-03-28Bibliographically approved

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Åsman, Barbro
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