期刊
PHYSICAL REVIEW D
卷 83, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.031104
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, Germany
- World Class University, National Research Foundation of Korea
- 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 Ciencia e Innovacion
- Programa Consolider-Ingenio, Spain
- Slovak R D Agency
- Academy of Finland
- Science and Technology Facilities Council [ST/H001069/1, ST/H001026/1, ST/H001026/2, ST/H001077/1, PP/E000444/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [18071002] Funding Source: KAKEN
- STFC [ST/H001026/2, ST/H001026/1, ST/H001069/1, ST/H001077/1] Funding Source: UKRI
The t (t) over bar spin correlation at production is a fundamental prediction of QCD and a potentially incisive test of new physics coupled to top quarks. We measure the t (t) over bar spin state in p (p) over bar collisions at root s = 1.96 TeV using 1001 candidate events in the lepton plus jets decay channel reconstructed in the CDF II detector. In the helicity basis, for a top-quark mass of 172.5 GeV/c(2), we find a spin correlation coefficient kappa = 0.60 +/- 0.50 (stat) +/- 0: 16 (syst), consistent with the QCD prediction, kappa approximate to 0.40.
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