Zgamma production and limits on anomalous ZZgamma and Zgammagamma couplings in ppbar collisions at sqrt(s) = 1.96 TeV

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dc.creatorD0 Collaboration
dc.creatorAbazov, V.
dc.date2007-05-10
dc.date2007-12-21
dc.date.accessioned2026-07-07T11:56:48Z
dc.date.available2026-07-07T11:56:48Z
dc.descriptionWe present a study of eegamma and mumugamma events using 1109 (1009) pb-1 of data in the electron (muon) channel, respectively. These data were collected with the D0 detector at the Fermilab Tevatron ppbar Collider at sqrt(s) = 1.96 TeV. Having observed 453 (515) candidates in the eegamma (mumugamma) final state, we measure the Zgamma production cross section for a photon with transverse energy ET > 7 GeV, separation between the photon and leptons Delta R(lgamma) > 0.7, and invariant mass of the di-lepton pair M(ll) > 30 GeV/c^2, to be 4.96 +/- 0.30(stat. + syst.) +/- 0.30(lumi.) pb, in agreement with the standard model prediction of 4.74 +/- 0.22 pb. This is the most precise Zgamma cross section measurement at a hadron collider. We set limits on anomalous trilinear Zgammagamma and ZZgamma gauge boson couplings of -0.085 < h(30)^(gamma) < 0.084, -0.0053 < h(40)^(gamma) < 0.0054 and -0.083 < h(30)^(Z) < 0.082, -0.0053 < h(40)^(Z) < 0.0054 at the 95% C.L. for the form-factor scale Lambda = 1.2 TeV.
dc.description8 pages, 6 figures. Published in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/0705.1550
dc.identifierhttp://arxiv.org/abs/0705.1550
dc.identifierPhys.Lett.B653:378-386,2007
dc.identifierdoi:10.1016/j.physletb.2007.08.035
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205664
dc.subjectHigh Energy Physics - Experiment
dc.titleZgamma production and limits on anomalous ZZgamma and Zgammagamma couplings in ppbar collisions at sqrt(s) = 1.96 TeV
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