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
- Chicago Univ., IL (United States). Enrico Fermi Inst.
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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 438993
- Report Number(s):
- FNAL/C-96/330-E; CONF-960291-2; ON: DE97050029; IN: CDF/PUB/TOP/PUBLIC/3650; TRN: 97:004319
- Resource Relation:
- Conference: Lake Louise Winter Institute: topics in electroweak physics, Lake Louise (Canada), 18-24 Feb 1996; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
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