W+ W- boson pair production in proton-proton collisions at root s=13 TeV
- Title
- W+ W- boson pair production in proton-proton collisions at root s=13 TeV
- Author
- 김태정
- Issue Date
- 2020-11
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v. 102, no. 9, article no. 092001, page. 1-1
- Abstract
- 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.
- URI
- https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.092001https://repository.hanyang.ac.kr/handle/20.500.11754/172782
- ISSN
- 2470-0010; 2470-0029
- DOI
- 10.1103/PhysRevD.102.092001
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
- Files in This Item:
- W+ W- boson pair production in proton-proton collisions at root s=13 TeV.pdfDownload
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