Journal
PHYSICAL REVIEW D
Volume 83, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.112003
Keywords
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Funding
- 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
- 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, Spain
- Slovak RD Agency
- Academy of Finland
- Grants-in-Aid for Scientific Research [18071002] Funding Source: KAKEN
- Science and Technology Facilities Council [PP/E000444/1, ST/H001077/1, ST/H001069/1, ST/H001026/1, ST/H001026/2] Funding Source: researchfish
- STFC [ST/H001026/1, ST/H001077/1, ST/H001069/1, ST/H001026/2] Funding Source: UKRI
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We present a new measurement of the inclusive forward-backward t (t) over bar production asymmetry and its rapidity and mass dependence. The measurements are performed with data corresponding to an integrated luminosity of 5.3 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV, recorded with the CDF-II Detector at the Fermilab Tevatron. Significant inclusive asymmetries are observed in both the laboratory frame and the t (t) over bar rest frame, and in both cases are found to be consistent with CP conservation under interchange of t and (t) over bar. In the t (t) over bar rest frame, the asymmetry is observed to increase with the t (t) over bar rapidity difference, Delta y, and with the invariant mass M-t (t) over bar of the t (t) over bar system. Fully corrected parton-level asymmetries are derived in two regions of each variable, and the asymmetry is found to be most significant at large Delta y and M-t (t) over bar. For M-t (t) over bar >= 450 GeV/c(2), the parton-level asymmetry in the t (t) over bar rest frame is A(t (t) over bar) = 0.475 +/- 0.114 compared to a next-to-leading order QCD prediction of 0.088 +/- 0.013.
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