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Measurement of the t t-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at sqrt(s) = 13 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 июня 2019 г.
- Авторы: Baskakov A., Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Katkov I., Klyukhin V., Korneeva N., Lokhtin I., Obraztsov S., Perfilov M., Popov A.A., Savrin V., Volkov P., CMS Collaboration
- Журнал: European Physical Journal C
- Том: 79
- Номер: 5
- Год издания: 2019
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 368
- DOI: 10.1140/epjc/s10052-019-6863-8
- Аннотация: A measurement of the top quark-antiquark pair production cross section σtt¯ 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±μ∓, μ+μ−, e+e−) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMCt= 172.5 GeV the fit yields a measured cross section σtt¯= 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 mMCt= 172.33 ± 0.14 (stat) +0.66−0.72 (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.
- Добавил в систему: Лохтин Игорь Петрович