Observation of Single Top Quark Production at the Tevatron

Conference · Tue Sep 01 04:00:00 EDT 2009

OSTI ID:965406

Heinson, A P

This paper reports on the first observation of electroweak production of single top quarks by the D0 and CDF collaborations. At Fermilab's 1.96 TeV proton-antiproton collider, a few thousand events are selected from several inverse femtobarns of data that contain an isolated electron or muon and/or missing transverse energy, together with jets that originate from the decays of b quarks. Using sophisticated multivariate analyses to separate signal from background, the D0 collaboration measures a cross section {sigma} (p{bar p} {yields} tb + X, tqb + X) = 3.94 {+-} 0.88 pb (for a top quark mass of 170 GeV) and the CDF collaboration measures a value of 2.3{sub -0.5}{sup +0.6} pb (for a top quark mass of 175 GeV). These values are consistent with theoretical predictions at next-to-leading order precision. Both measurements have a significance of 5.0 standard deviations, meeting the benchmark to be considered unambiguous observation.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 965406
• Report Number(s): FERMILAB-CONF-09-431-E; arXiv eprint number arXiv:0909.4518
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
B QUARKS
BENCHMARKS
CROSS SECTIONS
ELECTRONS
Experiment-HEP
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
MUONS
PRODUCTION
T QUARKS
TRANSVERSE ENERGY