W + W − boson pair production in proton-proton collisions at √ s = 13 TeV
Name
PhysRevD.102.092001.pdf
Description
Published version
Size
1.55 MB
Format
Adobe PDF
Checksum (MD5)
238421da2e41c5a3ebf67b4b5c420c7e
Author(s)
Harris, Philip
Date Issued
2020
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Harris, Philip. 2020. "W + W − boson pair production in proton-proton collisions at √ s = 13 TeV." Physical Review D, 102 (9).
Version
Final published version
Abstract
© 2020 CERN. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVD.102.092001
