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Measurement of the Z gamma -> nu(nu)over-bar gamma Production Cross Section and Limits on Anomalous ZZ gamma and Z gamma gamma Couplings in p(p)over-bar Collisions at root s=1.96 TeV
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2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, no 20, 201802- p.Article in journal (Refereed) Published
Abstract [en]

We present the first observation of the Z gamma -> nu(nu) over bar gamma process at the Fermilab Tevatron at 5.1 standard deviations significance, based on 3.6 fb(-1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron p (p) over bar Collider at root s = 1.96 TeV. The measured Z gamma production cross section multiplied by the branching fraction of Z -> nu(nu) over bar is 32 +/- 9(stat + syst) +/- 2(lumi) fb for the photon E-T > 90 GeV. It is in agreement with the standard model prediction of 39 +/- 4 fb. We set limits on anomalous trilinear Z gamma gamma and ZZ gamma gauge boson couplings, most of which are the most restrictive to date.

Place, publisher, year, edition, pages
2009. Vol. 102, no 20, 201802- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-129011DOI: 10.1103/PhysRevLett.102.201802ISI: 000266309000011OAI: oai:DiVA.org:uu-129011DiVA: diva2:332450
Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-01-03Bibliographically approved

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Uppsala UniversityDepartment of Physics and Materials Science
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