期刊
PHYSICAL REVIEW D
卷 87, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.092002
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 Program
- National Research Foundation of Korea
- Science and Technology Facilities Council
- Royal Society, UK
- Russian Foundation for Basic Research
- Ministerio de Ciencia e Innovacion
- Programa Consolider-Ingenio, Spain
- Slovak RD Agency
- Academy of Finland
- Australian Research Council (ARC)
- STFC [ST/H001085/2, ST/H001085/1, ST/K00140X/1, ST/J005568/1, ST/H001069/2, ST/K00137X/1, ST/K000748/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001085/1, ST/M001474/1, ST/J005568/1, ST/K000748/1, ST/K00140X/1, ST/H001085/2, ST/K001418/1, ST/H001069/2, ST/K00137X/1] Funding Source: researchfish
- ICREA Funding Source: Custom
We present new measurements of the inclusive forward-backward t (y) over bar production asymmetry, A(FB), and its dependence on several properties of the t (t) over bar system. The measurements are performed with the full Tevatron data set recorded with the CDF II detector during p (p) over bar collisions at root s = 1.96 TeV, corresponding to an integrated luminosity of 9.4 fb(-1). We measure the asymmetry using the rapidity difference Delta y = y(t) - y((t) over bar) Parton-level results are derived, yielding an inclusive asymmetry of 0.164 +/- 0.047(stat + syst). We establish an approximately linear dependence of AFB on the top-quark pair mass M-t (t) over bar and the rapidity difference vertical bar Delta y vertical bar at detector and parton levels. Assuming the standard model, the probabilities to observe the measured values or larger for the detector-level dependencies are 7.4 x 10(-3) and 2.2 x 10(-3) for M-tt and vertical bar Delta y vertical bar respectively. Lastly, we study the dependence of the asymmetry on the transverse momentum of the t (t) over bar system at the detector level. These results are consistent with previous lower-precision measurements and provide additional quantification of the functional dependencies of the asymmetry.
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