期刊
PHYSICAL REVIEW D
卷 84, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.072003
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
- Korean World Class University, the 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 2010, Spain
- Slovak RD Agency
- Academy of Finland
- Australian Research Council (ARC)
- STFC [ST/H001069/1, ST/H001026/1, ST/H001026/2] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001026/2, ST/H001026/1, ST/H001069/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [18071002] Funding Source: KAKEN
- ICREA Funding Source: Custom
This paper reports a search for nonstandard model topquark resonances, Z', decaying to t (t) over bar -> W(+)bW(-)(b) over bar, where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of p (p) over bar collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb(-1). No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z' has a width of Gamma(Z') = 0.012M(Z'). Within this model, we exclude a Z' boson with masses below 805 GeV/c(2) at the 95% confidence level.
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