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https://elib.bsu.by/handle/123456789/288268
Заглавие документа: | W+W- boson pair production in proton-proton collisions at s =13 TeV |
Авторы: | Chekhovsky, V. Litomin, A. Makarenko, V. Suarez Gonzalez, J. CMS Collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2020 |
Издатель: | American Physical Society |
Библиографическое описание источника: | Phy Rev D 2020;102(9) |
Аннотация: | A measurement of the W+W- boson pair production cross section in proton-proton collisions at s=13 TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9 fb-1. The W+W- candidate events are selected by requiring two oppositely charged leptons (electrons or muons). Two methods for reducing background contributions are employed. In the first one, a sequence of requirements on kinematic quantities is applied allowing a measurement of the total production cross section, 117.6±6.8 pb, which agrees well with the theoretical prediction. Fiducial cross sections are also reported for events with zero or one jet, and the change in the zero-jet fiducial cross section with the jet transverse momentum threshold is measured. Normalized differential cross sections are reported within the fiducial region. A second method for suppressing background contributions employs two random forest classifiers. The analysis based on this method includes a measurement of the total production cross section and also a measurement of the normalized jet multiplicity distribution in W+W- events. Finally, a dilepton invariant mass distribution is used to probe for physics beyond the standard model in the context of an effective field theory, and constraints on the presence of dimension-6 operators are derived. |
URI документа: | https://elib.bsu.by/handle/123456789/288268 |
DOI документа: | 10.1103/PhysRevD.102.092001 |
Scopus идентификатор документа: | 85096654850 |
Лицензия: | info:eu-repo/semantics/openAccess |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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PhysRevD.102.092001.pdf | 1,59 MB | Adobe PDF | Открыть |
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