Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот документ:
https://elib.bsu.by/handle/123456789/258190
Заглавие документа: | Measurements of top-quark pair to Z-boson cross-section ratios at √s=13 , 8, 7 TeV with the ATLAS detector |
Авторы: | Hrynevich, A. ATLAS collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2017 |
Издатель: | Springer Verlag |
Библиографическое описание источника: | J High Energy Phys 2017;2017(2). |
Аннотация: | Ratios of top-quark pair to Z-boson cross sections measured from proton-proton collisions at the LHC centre-of-mass energies of s=13 TeV, 8 TeV, and 7 TeV are presented by the ATLAS Collaboration. Single ratios, at a given s for the two processes and at different s for each process, as well as double ratios of the two processes at different s, are evaluated. The ratios are constructed using previously published ATLAS measurements of the tt¯ and Z-boson production cross sections, corrected to a common phase space where required, and a new analysis of Z → ℓ+ℓ− where ℓ = e, μ at s=13 TeV performed with data collected in 2015 with an integrated luminosity of 3.2 fb−1. Correlations of systematic uncertainties are taken into account when evaluating the uncertainties in the ratios. The correlation model is also used to evaluate the combined cross section of the Z → e+e− and the Z → μ+μ− channels for each s value. The results are compared to calculations performed at next-to-next-to-leading-order accuracy using recent sets of parton distribution functions. The data demonstrate significant power to constrain the gluon distribution function for the Bjorken-x values near 0.1 and the light-quark sea for x < 0.02.[Figure not available: see fulltext.] |
URI документа: | https://elib.bsu.by/handle/123456789/258190 |
DOI документа: | 10.1007/JHEP02(2017)117 |
Scopus идентификатор документа: | 85016562530 |
Финансовая поддержка: | National Science Foundation (NSF), 1624739; Seventh Framework Programme (FP7), 246806; Science and Technology Facilities Council (STFC), ST/N000420/1. |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
---|---|---|---|---|
Aaboud2017_Article_MeasurementsOfTop-quarkPairToZ.pdf | 2,45 MB | Adobe PDF | Открыть |
Все документы в Электронной библиотеке защищены авторским правом, все права сохранены.