We present a measurement of ppbar->Zγ + X -> e<sup>+</sup>e<sup>-</sup>γ + X production using proton-antiproton collision data collected at the Collider Detector at Fermilab at a center of mass energy of 1.96 TeV. Zγ production provides a direct test of the triple neutral gauge couplings. A measurement of Zγ production cross section and search for anomalous ZZγ and Zγγ couplings are presented.
The data presented are from 1.1 fb<sup>-1</sup> of ppbar integrated luminosity collected at the CDF Detector. Electrons from Z decays are selected with E<sub>t</sub> > 20 GeV. Photons (E<sub>t</sub> > 7 GeV) are required to be well-separated from the electrons. There are 390 eeγ candidate events found with 1.1 fb<sup>-1</sup> of data, compared to the SM prediction of 375.3 à ± 25.2 events. The Standard Model prediction for the cross section for ppbar-> e<sup>+</sup>e<sup>-</sup>γ + X
production at √s = 1.96 TeV is 4.5 à ± 0.4 pb. The measured cross section is 4.7 à ± 0.6 pb. The cross section and kinematic distributions of the eeγ events are in good agreement with theoretical predictions.
Limits on the ZZγ and Zγγ couplings are extracted using the photon E<sub>t</sub> distribution of eeγ events with M<sub>eeγ</sub> > 100 GeV/c<sup>2</sup>. These are the first limits measured using CDF Run II data. These limits provide important test of the interaction of the photon and the Z boson. / Dissertation
| Identifer | oai:union.ndltd.org:DUKE/oai:dukespace.lib.duke.edu:10161/623 |
| Date | 19 March 2008 |
| Creators | Deng, Jianrong |
| Contributors | Goshaw, Alfred T. |
| Source Sets | Duke University |
| Language | en_US |
| Detected Language | English |
| Type | Dissertation |
| Format | 8475700 bytes, application/pdf |
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