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Observation of electroweak production of same-sign W Boson pairs in the two jet and two same-sign lepton final state in proton-proton collisions at √s = 13 TeV

Observation of electroweak production of same-sign W Boson pairs in the two jet and two same-sign lepton final state in proton-proton collisions at √s = 13 TeV
Observation of electroweak production of same-sign W Boson pairs in the two jet and two same-sign lepton final state in proton-proton collisions at √s = 13 TeV
The first observation of electroweak production of same-sign W boson pairs in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. Events are selected by requiring exactly two leptons (electrons or muons) of the same charge, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass. The observed significance of the signal is 5.5 standard deviations, where a significance of 5.7 standard deviations is expected based on the standard model. The ratio of measured event yields to that expected from the standard model at leading order is 0.90 ± 0.22. A cross section measurement in a fiducial region is reported. Bounds are given on the structure of quartic vector boson interactions in the framework of dimension-8 effective field theory operators and on the production of doubly charged Higgs bosons.
1079-7114
1-17
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Sirunyan, A.M. , The CMS Collaboration (2018) Observation of electroweak production of same-sign W Boson pairs in the two jet and two same-sign lepton final state in proton-proton collisions at √s = 13 TeV. Physical Review Letters, 120 (8), 1-17, [081801]. (doi:10.1103/PhysRevLett.120.081801).

Record type: Article

Abstract

The first observation of electroweak production of same-sign W boson pairs in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. Events are selected by requiring exactly two leptons (electrons or muons) of the same charge, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass. The observed significance of the signal is 5.5 standard deviations, where a significance of 5.7 standard deviations is expected based on the standard model. The ratio of measured event yields to that expected from the standard model at leading order is 0.90 ± 0.22. A cross section measurement in a fiducial region is reported. Bounds are given on the structure of quartic vector boson interactions in the framework of dimension-8 effective field theory operators and on the production of doubly charged Higgs bosons.

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PhysRevLett.120.081801 - Version of Record
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e-pub ahead of print date: 22 February 2018
Published date: 23 February 2018

Identifiers

Local EPrints ID: 418823
URI: http://eprints.soton.ac.uk/id/eprint/418823
ISSN: 1079-7114
PURE UUID: 6c928a6b-50d0-4d9a-8ee0-d1b8ae472583
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 23 Mar 2018 17:30
Last modified: 17 Dec 2019 01:44

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