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http://earchive.tpu.ru/handle/11683/72769
Title: | W+W− boson pair production in proton-proton collisions at √s=13 TeV |
Authors: | Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Tyurin, Nikolay Evgenjevich Babaev, Anton Anatoljevich Sukhikh, Leonid Grigorievich |
Issue Date: | 2020 |
Publisher: | American Physical Society |
Citation: | W+W− boson pair production in proton-proton collisions at √s=13 TeV / A. M. Sirunyan, A. R. Tumasyan, W. Adam [et al.] // Physical Review D. — 2020. — Vol. 102, iss. 9. — [092001, 30 p.]. |
Abstract: | 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: | http://earchive.tpu.ru/handle/11683/72769 |
Appears in Collections: | Репринты научных публикаций |
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reprint-nw-37371.pdf | 1,59 MB | Adobe PDF | View/Open |
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