期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.252001
关键词
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资金
- U.S. Department of Energy
- National Science Foundation
- Italian Istituto Nazionale di Fisica Nucleare
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Natural Sciences and Engineering Research Council of Canada
- National Science Council of the Republic of China
- Swiss National Science Foundation
- A.P. Sloan Foundation
- Bundesministerium fur Bildung und Forschung
- Alexander von Humboldt Foundation, Germany
- Korean Science and Engineering Foundation
- Korean Research Foundation
- Science and Technology Facilities Council
- Royal Society, UK
- Institut National de Physique Nucleaire et Physique des Particules/CNRS
- Russian Foundation for Basic Research
- Ministerio de Educacion y Ciencia and Programa Consolider-Ingenio 2010, Spain
- Slovak Ramp
- D Agency
- Academy of Finland
- STFC [PP/E000452/1, PP/E002722/1, ST/G502412/1] Funding Source: UKRI
- Science and Technology Facilities Council [PPA/A/S/2003/00461/2, PP/E000452/1, PP/E002722/1, PP/E000444/1, ST/G502412/1] Funding Source: researchfish
We report a measurement of the single-top-quark production cross section in 2.2 fb(-1) of p (p) over bar collision data collected by the Collider Detector at Fermilab at root s = 1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2(-0.6)(+0.7)(stat + syst) pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value vertical bar V(tb)vertical bar 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit vertical bar V(tb)vertical bar > 0.66 at the 95% C.L.
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