Search for the production of the standard model z boson in association with W<sup>±</sup> boson in proton anti-p collisions at 1.96 TeV center of mass energy

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The search for the production of the Standard Model Z boson in association with a W boson is motivated and discussed. This is performed using 4.3 fb<sup>-1</sup> of Tevatron Run II data collected with the CDF detector in √s = 1.96 TeV proton anti-proton collisions. This is a signature-based analysis where the W boson decays semileptonically into a high-P<sub>T</sub> electron or muon plus a neutrino, and where the Z boson decays into two b quark jets (b-jets). We increase the signal-to-background ratio by identifying the b-quarks in the jets with a new neural network-based algorithm. Another neural network then uses ... continued below

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162 p.

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Keung, Justin Kien January 1, 2010.

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The search for the production of the Standard Model Z boson in association with a W boson is motivated and discussed. This is performed using 4.3 fb<sup>-1</sup> of Tevatron Run II data collected with the CDF detector in √s = 1.96 TeV proton anti-proton collisions. This is a signature-based analysis where the W boson decays semileptonically into a high-P<sub>T</sub> electron or muon plus a neutrino, and where the Z boson decays into two b quark jets (b-jets). We increase the signal-to-background ratio by identifying the b-quarks in the jets with a new neural network-based algorithm. Another neural network then uses kinematic information to distinguish WZ to further increase the signal-to-background ratio. Since our sensitivity is still not enough to achieve an observation, we set a 95% Confidence Level upper limit on the product of the WZ production cross section and its branching fraction to the decay products specified above, and express it as a ratio to the theoretical Standard Model prediction. The resulting limit is 3.9 x SM (3.9 x SM expected).

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162 p.

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  • Report No.: FERMILAB-THESIS--2010-32
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/985422 | External Link
  • Office of Scientific & Technical Information Report Number: 985422
  • Archival Resource Key: ark:/67531/metadc1013793

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 25, 2017, 4:30 p.m.

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Keung, Justin Kien. Search for the production of the standard model z boson in association with W<sup>±</sup> boson in proton anti-p collisions at 1.96 TeV center of mass energy, thesis or dissertation, January 1, 2010; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1013793/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.