Evidence for $$\text {W}\text {W}$$WW production from double-parton interactions in proton–proton collisions at $$\sqrt{s} = 13 \,\text {TeV} $$s=13TeV
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10052_2019_Article_7541.pdf
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Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Ambrogi, F.
Bergauer, T.
Brandstetter, J.
Dragicevic, M.
Erö, J.
Escalante Del Valle, A.
Flechl, M.
Date Issued
January 17, 2020
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2020 Jan 17;80(1):41
Version
Final published version
Abstract
Abstract
A search for $$\text {W}\text {W}$$WW production from double-parton scattering processes using same-charge electron-muon and dimuon events is reported, based on proton-proton collision data collected at a center-of-mass energy of $$13\,\text {TeV} $$13TeV. The analyzed data set corresponds to an integrated luminosity of $$77.4{\,\text {fb}^{-1}} $$77.4fb-1, collected using the CMS detector at the LHC in 2016 and 2017. Multivariate classifiers are used to discriminate between the signal and the dominant background processes. A maximum likelihood fit is performed to extract the signal cross section. This leads to the first evidence for $$\text {W}\text {W}$$WW production via double-parton scattering, with a significance of 3.9 standard deviations. The measured inclusive cross section is $$1.41\pm 0.28\,\text {(stat)} \pm 0.28\,\text {(syst)} \,\text {pb} $$1.41±0.28(stat)±0.28(syst)pb.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-019-7541-6
