Publication: W+ W- boson pair production in proton-proton collisions at root s=13 TeV
Дата
2020
Авторы
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Matveev, V.
Chadeeva, M.
Oskin, A.
Parygin, P.
Popova, E.
Rusinov, V.
Journal Title
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Аннотация
A measurement of the W+W- boson pair production cross section in proton-proton collisions at root 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.
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Цитирование
W+ W- boson pair production in proton-proton collisions at root s=13 TeV / Sirunyan, AM [et al.] // Physical Review D. - 2020. - 102. - № 9. - 10.1103/PhysRevD.102.092001
URI
https://www.doi.org/10.1103/PhysRevD.102.092001
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https://openrepository.mephi.ru/handle/123456789/22616
https://www.scopus.com/record/display.uri?eid=2-s2.0-85096654850&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000587596500003
https://openrepository.mephi.ru/handle/123456789/22616