W+W- boson pair production in proton-proton collisions at s =13 TeV

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dc.date.accessioned2022-05-01T01:25:47Z
dc.date.accessioned2022-12-20T03:36:01Z
dc.date.available2022-05-01T01:25:47Z
dc.date.available2022-12-20T03:36:01Z
dc.date.created2022-05-01T01:25:47Z
dc.date.issued2020-01-01
dc.identifierPhysical Review D, v. 102, n. 9, 2020.
dc.identifier2470-0029
dc.identifier2470-0010
dc.identifierhttp://hdl.handle.net/11449/233061
dc.identifier10.1103/PhysRevD.102.092001
dc.identifier2-s2.0-85096654850
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5413160
dc.description.abstractA 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.
dc.languageeng
dc.relationPhysical Review D
dc.sourceScopus
dc.titleW+W- boson pair production in proton-proton collisions at s =13 TeV
dc.typeArtículos de revistas


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