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Measurement of the cross section for t tbar production with additional jets and b jets in pp collisions at sqrt(s) = 13 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 декабря 2020 г.
- Авторы: Baskakov A., Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Klyukhin V., Korneeva N., Lokhtin I., Obraztsov S., Perfilov M., Savrin V., Volkov P., CMS Collaboration
- Журнал: Journal of High Energy Physics
- Том: 2020
- Номер: 7
- Год издания: 2020
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 125
- DOI: 10.1007/jhep07(2020)125
- Аннотация: Measurements of the cross section for the production of top quark pairs in association with a pair of jets from bottom quarks (σtt¯bb¯) and in association with a pair of jets from quarks of any flavor or gluons (σtt¯jj) and their ratio are presented. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The measurements are performed in a fiducial phase space and extrapolated to the full phase space, separately in the dilepton and lepton+jets channels, where lepton corresponds to either an electron or a muon. The results for the dilepton and lepton+jets channels, respectively, are σtt¯jj = 2.36 ± 0.02 (stat) ± 0.20 (syst) pb and 31.0 ± 0.2 (stat) ± 2.9 (syst) pb, and for the cross section ratio 0.017 ± 0.001 (stat) ± 0.001 (syst) and 0.020 ± 0.001 (stat) ± 0.001 (syst). The values of σtt¯bb¯ are determined from the product of the σtt¯jj and the cross section ratio, obtaining, respectively, 0.040 ± 0.002 (stat) ± 0.005 (syst) pb and 0.62 ± 0.03 (stat) ± 0.07 (syst) pb. These measurements are the most precise to date and are consistent, within the uncertainties, with the standard model expectations obtained using a matrix element calculation at next-to-leading order in quantum chromodynamics matched to a parton shower.
- Добавил в систему: Лохтин Игорь Петрович