A measurement of the top quark mass in 1.96 TeV proton-antiproton collisions using a novel matrix element method

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A measurement of the top quark mass in t{bar t} {yields} l + jets candidate events, obtained from p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron using the CDF II detector, is presented. The measurement approach is that of a matrix element method. For each candidate event, a two dimensional likelihood is calculated in the top pole mass and a constant scale factor, 'JES', where JES multiplies the input particle jet momenta and is designed to account for the systematic uncertainty of the jet momentum reconstruction. As with all matrix elements techniques, the method involves an ... continued below

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189 pages

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Freeman, John C. December 1, 2007.

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A measurement of the top quark mass in t{bar t} {yields} l + jets candidate events, obtained from p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron using the CDF II detector, is presented. The measurement approach is that of a matrix element method. For each candidate event, a two dimensional likelihood is calculated in the top pole mass and a constant scale factor, 'JES', where JES multiplies the input particle jet momenta and is designed to account for the systematic uncertainty of the jet momentum reconstruction. As with all matrix elements techniques, the method involves an integration using the Standard Model matrix element for tt production and decay. however, the technique presented is unique in that the matrix element is modified to compensate for kinematic assumptions which are made to reduce computation time. Background events are dealt with through use of an event observable which distinguishes signal from background, as well as through a cut on the value of an event's maximum likelihood. Results are based on a 955 pb{sup -1} data sample, using events with a high-p{sub T} lepton and exactly four high-energy jets, at least one of which is tagged as coming from a b quark; 149 events pass all the selection requirements. They find M{sub meas} = 169.8 {+-} 2.3(stat.) {+-} 1.4(syst.) GeV/c{sup 2}.

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189 pages

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  • Report No.: FERMILAB-THESIS-2007-59
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/928516 | External Link
  • Office of Scientific & Technical Information Report Number: 928516
  • Archival Resource Key: ark:/67531/metadc900970

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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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  • December 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 26, 2017, 1:11 p.m.

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Freeman, John C. A measurement of the top quark mass in 1.96 TeV proton-antiproton collisions using a novel matrix element method, thesis or dissertation, December 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc900970/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.