Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections
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A measurement of the top quark pair production () cross section in proton-proton collisions at the centre-of-mass energy of 8 is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6. This analysis is performed in the decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured cross section is . This measurement is compared with an analysis of 7 data, corresponding to an integrated luminosity of 5.0, to determine the ratio of 8 to 7 cross sections, which is found to be . The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.
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European Physical Journal C. New York: Springer, v. 77, n. 1, p. 1-27, 2017.
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Austrian Federal Ministry of Science, Research and Economy and the Austrian Science Fund
Belgian Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk Onderzoek
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Bulgarian Ministry of Education and Science
CERN
Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural Science Foundation of China
Colombian Funding Agency (COLCIENCIAS)
Croatian Ministry of Science, Education and Sport, and the Croatian Science Foundation
Research Promotion Foundation, Cyprus
Ministry of Education and Research, Estonian Research Council
