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Combinations of single-top-quark production cross-section measurements and |f_LV V_tb| determinations at sqrt(s) =7 and 8 TeV with the ATLAS and CMS experimentsстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 сентября 2021 г.
- Авторы: Boldyrev A.S., Denisov S.P., Gladilin L.K., Kramarenko V.A., Maevsky A.S., Sivoklokov S.Yu, Smirnova L.N., Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Gribushin A., Katkov I., Klyukhin V., Korneeva N., Lokhtin I., Obraztsov S., Perfilov M., Popov A.A., Savrin V., Volkov P., ATLAS Collaboration, CMS Collaboration
- Журнал: Journal of High Energy Physics
- Том: 2019
- Номер: 5
- Год издания: 2019
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 88
- DOI: 10.1007/JHEP05(2019)088
- Аннотация: This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at s√=7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at s√=7 TeV, and 12.2 to 20.3 fb−1 at s√=8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5±5.7 pb and 87.7±5.8 pb at s√=7 and 8 TeV respectively. The combined tW cross-sections are 16.3±5.7 pb and 23.1±3.6 pb at s√=7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9±1.4 pb at s√=8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLVis determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |Vtd|,|Vts|≪|Vtb|. All the |fLVVtb|2 determinations, extracted from individual ratios at s√=7 and 8 TeV, are combined, resulting in |fLVVtb|=1.02±0.04 (meas.) ±0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.
- Добавил в систему: Лохтин Игорь Петрович