Observation of top quarks in the dilepton decay channel t{anti t} {yields} e({mu}){upsilon}{sub e({mu})} {tau}{upsilon}{sub {tau}} b{anti b} using hadronic tau decays at CDF

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We present a search for dilepton events from top decays with one electron or muon and a hadronically decaying {tau} lepton. The total acceptance x efficiency is (O.119 {+-} 0.014({ital stat}))% for {ital m{sub top}} = 175 GeV. In 110 pb{sup -1} of data we expect 1.1 {+-} 0. 3({ital stat}) signal events and a total background of 1.96 {+-} 0.35({ital stat}) events while observing 4 candidate events (2 {ital e}{tau} and 2 {mu}{tau}). Three events are {ital b}-tagged. If a tag is required, the probability for the estimated background (0.225 {+-} 0.011 events) to fluctuate to {>=} 3 events ... continued below

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16 p.

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Hohlmann, M. September 1, 1996.

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We present a search for dilepton events from top decays with one electron or muon and a hadronically decaying {tau} lepton. The total acceptance x efficiency is (O.119 {+-} 0.014({ital stat}))% for {ital m{sub top}} = 175 GeV. In 110 pb{sup -1} of data we expect 1.1 {+-} 0. 3({ital stat}) signal events and a total background of 1.96 {+-} 0.35({ital stat}) events while observing 4 candidate events (2 {ital e}{tau} and 2 {mu}{tau}). Three events are {ital b}-tagged. If a tag is required, the probability for the estimated background (0.225 {+-} 0.011 events) to fluctuate to {>=} 3 events is 0.13% (3.0 {sigma}). A first measurement of the {ital t{anti t}} production cross section based on these events yields {sigma}{sub t{anti t}} = 15.6{sup +18. 6}{sub -13.2}({ital stat}) pb.

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16 p.

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INIS; OSTI as DE97050029

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  • Lake Louise Winter Institute: topics in electroweak physics, Lake Louise (Canada), 18-24 Feb 1996

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  • Other: DE97050029
  • Report No.: FNAL/C--96/330-E
  • Report No.: CONF-960291--2
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 438993
  • Archival Resource Key: ark:/67531/metadc688836

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  • September 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 10, 2016, 4:26 p.m.

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Hohlmann, M. Observation of top quarks in the dilepton decay channel t{anti t} {yields} e({mu}){upsilon}{sub e({mu})} {tau}{upsilon}{sub {tau}} b{anti b} using hadronic tau decays at CDF, article, September 1, 1996; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc688836/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.