Evidence for production of single top quarks and first direct measurement of |Vtb|
Journal Article
·
· Phys.Rev.Lett.98:181802,2007
OSTI ID:900835
The D0 Collaboration presents first evidence for the production of single top quarks at the Fermilab Tevatron p{bar p} collider. Using a 0.9 fb{sup -1} dataset, we apply a multivariate analysis to separate signal from background and measure {sigma}(p{bar p} {yields} tb + X, tqb + X) = 4.9 {+-} 1.4 pb. The probability to measure a cross section at this value or higher in the absence of signal is 0.035%, corresponding to a 3.4 standard deviation significance. We use the cross section measurement to directly determine the CKM matrix element that describes the W tb coupling and find 0.68 < |V{sub tb}| {le} 1 at 95% C.L.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 900835
- Report Number(s):
- FERMILAB-PUB-06-475-E; PRLTAO; arXiv eprint number hep-ex/0612052; TRN: US0702391
- Journal Information:
- Phys.Rev.Lett.98:181802,2007, Vol. 98; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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