Otero y Garzón, G. (2009) First observation of single-top-quark production. Il nuovo cimento C, 32 (5\6). pp. 281-288. ISSN 1826-9885
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Abstract
This paper reports the first observation of the electroweak production of single top quarks in p¯p collisions at a center-of-mass energy of 1.96TeV based on 2.3 fb−1 and 3.2 fb−1 of data collected by the DØ and CDF detectors, respectively, at the Fermilab Tevatron Collider. Using various multivariate techniques to separete the small signal from the large backgrounds, both experiments obtained a significance of the observed data of 5.0 standard deviations. DØ measures σ(p¯p → tb + X, tqb + X) = 3.94 ± 0.88 pb and CDF measures 2.3+0.6−0.5 pb. The CKM matrix element that couples the top and the bottom quarks is also measured. DØ reports |Vtb| > 0.78 at 95%CL when f1L = 1 and |Vtbf1L| = 1.02 ± 0.12. CDF measures |Vtb| = 0.91±0.11(stat+syst)±0.07(theory) and sets the limit |Vtb| > 0.71 at 95% CL.
| Item Type: | Article |
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| Uncontrolled Keywords: | Top quarks ; Applications of electroweak models to specific processes ; Inclusive production with identified leptons, photons, or other nonhadronic particles ; Determination of Kobayashi-Maskawa matrix elements |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 27 Mar 2020 17:00 |
| Last Modified: | 27 Mar 2020 17:00 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/16764 |
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