Measurement of the Ratio of Inclusive Cross Sections !(p-p!Z+b-jet) !(p-p!Z+jet) in the Dilepton Final States

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The inclusive production of b-jets with a Z boson is an important background to searches for the Higgs boson in associated ZH {yields} llb{bar b} production at the Fermilab Tevatron collider. This thesis describes the most precise measurement to date of the ratio of inclusive cross sections {sigma}(p{bar p} {yields} Z + b-jet)/{sigma}(p{bar p} {yields} Z + jet) when a Z boson decays into two electrons or muons. The measurement uses a data sample from p{bar p} collisions at the center of mass energy {radical}s = 1.96 TeV corresponding to an integrated luminosity of 4.2 fb{sup -1} collected by the ... continued below

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190 pages

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Smith, Kenneth James October 1, 2010.

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The inclusive production of b-jets with a Z boson is an important background to searches for the Higgs boson in associated ZH {yields} llb{bar b} production at the Fermilab Tevatron collider. This thesis describes the most precise measurement to date of the ratio of inclusive cross sections {sigma}(p{bar p} {yields} Z + b-jet)/{sigma}(p{bar p} {yields} Z + jet) when a Z boson decays into two electrons or muons. The measurement uses a data sample from p{bar p} collisions at the center of mass energy {radical}s = 1.96 TeV corresponding to an integrated luminosity of 4.2 fb{sup -1} collected by the D0 detector. The measured ratio {sigma}(Z + b-jet)/{sigma}(Z + jet) is 0.0187 {+-} 0.0021(stat) {+-} 0.0015(syst) for jets with transverse momentum p{sub T} > 20 GeV and pseudorapidity |{eta}| {le} 2.5. The measurement is compared with the next-to-leading order theoretical predictions from MCFM and is found to be consistent within uncertainties.

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190 pages

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  • Report No.: FERMILAB-THESIS-2010-68
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/1018735 | External Link
  • Office of Scientific & Technical Information Report Number: 1018735
  • Archival Resource Key: ark:/67531/metadc830145

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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.

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  • October 1, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 30, 2016, 3:28 p.m.

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Smith, Kenneth James. Measurement of the Ratio of Inclusive Cross Sections !(p-p!Z+b-jet) !(p-p!Z+jet) in the Dilepton Final States, thesis or dissertation, October 1, 2010; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc830145/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.