期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.182002
关键词
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资金
- U.S. Department of Energy and 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, U. K.
- Russian Foundation for Basic Research
- Ministerio de Ciencia e Innovacion and Programa Consolider-Ingenio, Spain
- Slovak RD Agency
- Academy of Finland
- Australian Research Council (ARC)
- EU Community Marie Curie Fellowship [302103]
- Science and Technology Facilities Council [ST/K000195/1, ST/K000748/1, PP/E003699/2, ST/K00140X/1, ST/H001085/2, ST/K00137X/1, PP/E003699/1, ST/H001069/2, ST/H001085/1, ST/M001474/1, ST/L00335X/1, ST/J005568/1] Funding Source: researchfish
- STFC [ST/K000195/1, ST/K000748/1, ST/K00137X/1, PP/E003699/1, ST/L00335X/1, ST/H001085/1, ST/H001085/2, ST/H001069/2, ST/K00140X/1, PP/E003699/2, ST/J005568/1] Funding Source: UKRI
- ICREA Funding Source: Custom
We report a measurement of the differential cross section d sigma = d(cos theta(t)) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at root s = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4 fb(-1). We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard- model calculation, with the exception of an excess linear-term coefficient a(1) = 0.40 +/- 0.12, compared to the standard-model prediction of a(1) = 0.15(-0.03)(+0.07)
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