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Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13 TeV with the ATLAS detectorстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 июля 2020 г.
- Авторы: Boldyrev A.S., Denisov S.P., Gladilin L.K., Korotkova N.A., Kramarenko V.A., Maevsky A.S., Meshkov O.V., Sinetckii V.V., Sivoklokov S.Yu, Smirnova L.N., Turchikhin S.M., ATLAS Collaboration
- Журнал: European Physical Journal C
- Том: 80
- Номер: 528
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 1
- Последняя страница: 70
- DOI: 10.1140/epjc/s10052-020-7907-9
- Аннотация: The inclusive top quark pair (tt¯) production cross-section σtt¯ has been measured in proton–proton collisions at s√=13TeV, using 36.1 fb−1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be: σ(tt¯)=826.4±3.6(stat) ±11.5(syst) ±15.7(lumi) ±1.9(beam)pb,where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mpolet, giving m_pole_t=173.1+2.0−2.1GeV. It is also combined with measurements at √s=7TeV and √s=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.
- Добавил в систему: Гладилин Леонид Константинович