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Evidence for Single Top Quark Production at D0.

DE2008908357

Publication Date	2007
Personal Author	Garcia-Bellido, A.
Page Count	6
Abstract	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 D0 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.
Keywords	T Quarks Algorithms Decay Electrons Fermilab tevatron Muons Probability Production Simulation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Fermi National Accelerator Lab., Batavia, IL.; Washington Univ., Seattle. Dept. of Physics.; Department of Energy, Washington, DC.
Supplemental Notes	Prepared in cooperation with Washington Univ., Seattle. Dept. of Physics. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200824
Contract Number	DOE-AC02-76CH03000

Evidence for Single Top Quark Production at D0.

Evidence for Single Top Quark Production at D0.
DE2008908357

Publication Date	2007
Personal Author	Garcia-Bellido, A.
Page Count	6
Abstract	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 D0 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.
Keywords	T Quarks Algorithms Decay Electrons Fermilab tevatron Muons Probability Production Simulation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Fermi National Accelerator Lab., Batavia, IL.; Washington Univ., Seattle. Dept. of Physics.; Department of Energy, Washington, DC.
Supplemental Notes	Prepared in cooperation with Washington Univ., Seattle. Dept. of Physics. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200824
Contract Number	DOE-AC02-76CH03000