Evidence for single top quark production at DØ

Conference · Fri Jun 01 00:00:00 EDT 2007

OSTI ID:908357

Garcia-Bellido, Aran  ^[1]

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1. Univ. of Washington, Seattle, WA (United States)

The results of the first analysis to show evidence for production of single top quarks are presented. Using 0.9 fb^-1 of data collected with the DØ detector at the Fermilab Tevatron, the analysis is performed in the electron jets and muon jets decay modes, taking special care in modeling the large backgrounds, applying a new powerful b-quark tagging algorithm and using three multivariate techniques to extract the small signal in the data. The combined measured production cross section is 4.8 ± 1.3 pb. The probability to measure a cross section at this value or higher in the absence of a signal is 0.027%, corresponding to a 3.5 standard deviation significance.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 908357
• Report Number(s): FERMILAB-CONF-07-144-E; arXiv eprint number arXiv:0706.0037; TRN: US0703666
• Resource Relation: Conference: 42nd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile (Italy), 10-17 Mar 2007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
CROSS SECTIONS
DECAY
ELECTRONS
FERMILAB TEVATRON
MUONS
PROBABILITY
PRODUCTION
SIMULATION
T QUARKS
Experiment-HEP