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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
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2007 (English)In: PHYSICAL REVIEW D, ISSN 1550-7998, Vol. 76, no 11, 111104-1-111104-8 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, 111104-1-111104-8 p.
Keyword [en]
FERMILAB TEVATRON, BOSON SECTOR, DETECTOR, PHYSICS
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-34430DOI: 10.1103/PhysRevD.76.111104ISI: 000251987200004Scopus ID: 2-s2.0-37649000954OAI: oai:DiVA.org:kth-34430DiVA: diva2:421326
Note
QC 20110608Available from: 2011-06-08 Created: 2011-06-08Bibliographically approved

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Strandberg, Jonas

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  • apa
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