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Measurement of the $Z\gamma\to\nu\bar{\nu}\gamma$ Cross Section and Limits on Anomalous $ZZ\gamma$ and $Z\gamma\gamma$ Couplings in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2009 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 102, 201802- p.Article in journal (Refereed) Published
Abstract [en]

We present the first observation of the Zγ→νν̅ γ 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 pp̅ Collider at √s=1.96  TeV. The measured Zγ production cross section multiplied by the branching fraction of Z→νν̅ is 32±9(stat+syst)±2(lumi)  fb for the photon ET>90  GeV. It is in agreement with the standard model prediction of 39±4  fb. We set limits on anomalous trilinear Zγγ and ZZγ gauge boson couplings, most of which are the most restrictive to date.

Place, publisher, year, edition, pages
2009. Vol. 102, 201802- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-33070DOI: 10.1103/PhysRevLett.102.201802OAI: oai:DiVA.org:su-33070DiVA: diva2:282310
Projects
D0
Note
Publikationen har totalt 499 författare, V. Abazov et al.Available from: 2009-12-18 Created: 2009-12-18 Last updated: 2017-12-12Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1103/PhysRevLett.102.201802

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