期刊
EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-019-6863-8
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- BMBWF (Austria)
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- Horizon 2020 Grant (European Union) [675440]
- Leventis Foundation
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- Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
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- Council of Science and Industrial Research, India
- HOMING PLUS programme of the Foundation for Polish Science
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- Mobility Plus programme of the Ministry of Science and Higher Education
- National Science Center (Poland) [Harmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406]
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- Programa Severo Ochoa del Principado de Asturias
- Thalis programme
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- Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand)
- Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand)
- Welch Foundation [C-1845]
- Weston Havens Foundation (USA)
- Science and Technology Facilities Council [ST/N000242/1] Funding Source: researchfish
A measurement of the top quark-antiquark pair production cross section sigma(t (t) over bar) in proton-proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb(-1), recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e(+/-) mu(-/+), mu(+) mu(-), e(+) e(-)) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of m(t)(MC) = 172.5 GeV the fit yields a measured cross section sigma(t (t) over bar) = 803 +/- 2 (stat) +/- 25 (syst) +/- 20 (lumi) pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the POWHEG simulation is performed. The measured value of m(t)(MC) = 172.33 +/- 0.14 (stat)(-0.72)(+0.66) (syst) GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions.
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