Abazov, V. M. ; Mondal, N. K. ; et, al (2007) Evidence for production of single top quarks and first direct measurement of |Vtb| Physical Review Letters, 98 (18). 181802_1-181802_8. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v98/i18/e181802
Related URL: http://dx.doi.org/10.1103/PhysRevLett.98.181802
Abstract
The D0 Collaboration presents first evidence for the production of single top quarks at the Fermilab Tevatron pp̅ collider. Using a 0.9 fb−1 dataset, we apply a multivariate analysis to separate signal from background and measure σ(pp̅→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 a signal is 0.035%, corresponding to a 3.4 standard deviation significance. We use the cross section measurement to directly determine the Cabibbo-Kobayashi-Maskawa matrix element that describes the Wtb coupling and find 0.68<|Vtb|≤ 1 at 95% C.L. within the standard model.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 76191 |
| Deposited On: | 31 Dec 2011 08:21 |
| Last Modified: | 31 Dec 2011 08:21 |
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